The staunch stance in Islam is that Allah “cannot” be a man. Time and time again Muslims will take verses out of context from the Bible saying “God is not a man” they partially quote Numbers 23:19. If you read the proceeding and following verses surrounding that verse you’ll have a clear understanding of the context.

Just within the one verse alone we can see that the text is saying God is not like us in the sense that we as humans do lie, God doesn’t lie. We as fallible humans need to repent, the same is not true of God as He is perfect. The second half of the verse says if God says He will do something will he not do it or make it come to past? It’s a rhetorical question and the answer is an emphatic yes!
But we have to bust the abdools in their lies let’s view the surrounding context of the immediate verses. The background of this chapter is The Prophecies of Balaam, Balak the king of Moab called for Balaam to come and curse the children of Israel. Instead of cursing them Balaam blessed them each time and told Balak he must say only that which the LORD has given him.[1] Balaam said to Balak:
How shall I curse, whom God hath not cursed? or how shall I defy, [whom] the LORD hath not defied? … And he answered and said, Must I not take heed to speak that which the LORD hath put in my mouth?
Numbers 23:8, 12

After reading the context we can see that this verse has nothing to do with God not becoming a man. Context is the dagger in the heart of Islam, because the Qur’an is a distorted book which has no context Muslims don’t know how to interpret scripture.
Allah cannot become a man

If the Qur’an is the ultimate source for Muslims then they are denying what the Qur’an says. It’s clear from this verse that “Allah is able to do all things” But he’s not able to become a man Muslims say which contradicts the Qur’an. That means he cannot do all things.
Here’s one statement from islamreligion.com in which they said:
The claim that God became man is also an absurdity. It is not befitting of God to take on human characteristics because it means that the Creator has become His creation. However, the creation is a product of the creative act of the Creator. If the Creator became His creation, it would mean that the Creator created Himself, which is an obvious absurdity. To be created, He would first have to not exist, and, if He did not exist, how could He then create? Furthermore, if He were created, it would mean that He had a beginning, which also contradicts His being eternal. By definition creation is in need of a creator. For created beings to exist they must have a creator to bring them into existence. God cannot need a creator because God is the Creator. Thus, there is an obvious contradiction in terms. The claim that God became His creation implies that He would need a creator, which is a ludicrous concept. It contradicts the fundamental concept of God being uncreated, needing no creator and being the Creator.
DID GOD BECOME MAN? (PART 4 OF 5): DID GOD BECOME MAN, CAN GOD BECOME MAN?
The moment they said God cannot do something proves they believe in a “god” who cannot do all things. That’s a major conundrum they’ve created for themselves. The Christian argument is that Almighty Yahweh can and did become a Man that’s not out of His abilities. Jesus Christ is Eternal and existed before He came into the world through Mary, we have many scriptures which prove this but one will suffice. Jesus in John 8 was debating the Jews and told them that Abraham rejoice to see His (Jesus‘) day.
They replied saying Jesus was not even 50 and it wouldn’t be possible for Abraham to have known Christ. And the Lord Jesus rocks them by saying “ Before Abraham was, I am”, they knew He claimed to be God, as their mind went back to when Moses spoke to God from the burning bush. The LORD said I AM THAT I AM (Exodus 3:14)

This is without a doubt one of the most powerful passages which proves the divinity of the Lord Jesus Christ and Muslims cannot contend with it.
Jibril is more powerful than Allah and can become a man
Let’s not forget Muslims say Allah cannot become a man for them they think God taking on human form means God would become “weak”. Here’s a statement from an Abdoool site called Calling Christians.
If God is all powerful and man is not all powerful, can God’s nature of being all powerful, change to becoming not all powerful? How can an all powerful God become less powerful?
If Allah is so powerful, why can’t he become a man?
Christians don’t believe God “change to becoming not all powerful”, we believe that God took upon Himself more specifically the Son of God took on human nature. But He did not lose His diety when He became a man as Jesus Christ said He would raise Himself from the dead.

If Jesus being God and took on human flesh made Him “weak” according to Muslims, then how is it He’s able to raise Himself from the dead. Does that sound like weakness? Allah cannot even do what Jesus Christ can yet they say such foolishness.
In the Qur’an Jibril has the ability to become a man when he came to Mary (Maryam), this is recorded in Surah Maryam.

So now what are Muslims going to say, Jibril is capable of becoming a man but Allah doesn’t have the ability to become a man. Therefore, if Muslims still want to say that Allah cannot become human logic would dictate that Jibril is more powerful than Allah.
Lastly, Muhammad described Allah as a man in the Hadith when he compared the Dajjal with Allah. Muhammad is busted because the Dajjal is a man, yet he says that it’s possible for the Muslims to be confused thinking the Dajjal is Allah.

Notice Muhammad is telling the Muslims the Dajjal is short, hen-toed, woolly haired and has one eye describing human characteristics. The Muhammad says if they are confused, now let’s stop here why would they be confused if Allah is not a human? Then Muhammad tells them the only difference between the Dajjal (a man) and Allah is that Allah is not one-eyed.
Conclusion
What have we learned, well Numbers 23:19 has nothing to do with God becoming a man the real context is that God doesn’t lie or neither does He need to repent of sins like we do. Allah cannot become human according to Abdoools who contradict 2:20 which says Allah can become a man. Jibril has the ability to become a man while Allah cannot as taught in Islam. And finally Muhammad described Allah with human qualities comparing him to the Dajjal.
Footnotes
[1] God twice meets Balaam and puts a word in his mouth and commands him to return and speak that word (23:5,16). God’s insistence on what he must say recognizes that Balaam does have options. It becomes increasingly clear, even to Balak (23:17), that God reveals through the word, not divination. In the third instance, the spirit of God comes upon him (see 11:17, 2 5~6) without consultation after he ‘sets his face’ and ‘sees’ Israel’s situation (24:2). Balaam speaks God’s blessings on Israel rather than curses. The blessings become less descriptive, more future oriented, and more properly blessings as one moves through the four oracles. Even more, those who curse Israel will themselves be cursed, while those who bless will be blessed (24:9). Prominent throughout is the language of seeing; the one who did not see the purposes of God (22:22-30) now does see them (23:9, 21, 23— 4; 24:3— 4,15— 17). Indeed, the clarity of his seeing increases over the course of the oracles; the most expansive claims are the ‘knowledge’ of 24:16 and the seeing into the future of 24:17. Falling down but alert (24:4,16) may refer to a qualified ecstatic reception of God’s word. Balaam ‘sees’ Israel’s history and God’s promises, moving from the past through the present to a more and more specific future: election from among the nations (23:9); promise (and fulfilment) of many descendants, like the dust of the earth (23:10; see Gen 13:16, 28:14), and blessing (24:9, cf. GEN 12:3); exodus (23:22; 24:8); God’s presence among them and his care in the wilderness (23:21; cf. 24:5-6). He anticipates a successful conquest, as both Israel and God are imaged as lions (22:23— 4; 24:7~9) the rise of the monarchy and specific conquests relating thereto (24:7,17-19). The overall scene for Balaam is a blessed people: numerous, confident, flourishing, powerful, and its king is God. In Balaam’s words (23:io):’let my end be like his!’