Only God is God.
Violent acts are apparently made in the name of God, but this is not God: they are false divinities that must be unmasked; they are not God.
False deities need not apply.
I have said this many times. The nature of God is to be always the same. There are a lot of things God cannot do.
God does not change. Still less does He change his mind about things. He does not, cannot, contradict Himself. He cannot be anti-rational, since rationality is one of the divine attributes given to us as His image.
I don't claim to know whether the man, Mohammed, actually had a visit from a supernatural being, but the religion he created would indicate that if he did, that being was not God or any of his holy angels.
The thing, the monster he describes in that religion, cannot be God, since it contradicts the things we know God must be.