السلام عليكم How should one respond with if an atheist were to ask "if Allah can do everything, can He brcome human?" Or "if Allah can do everything, can he enter into creation?"

Allah Subhanahu wa Ta'ala is capable of all things. Focus: all what? Things. Not nothings. What he is asking about are nothings, not things. It is like somebody coming and saying, "I want nothing, everything, something, and one thing at the same time together in one entity, in no entity, in some entity, in every entity" What is this? This is nonsense; it is not even a thing. You understand? The question itself doesn't make any sense whatsoever. Regarding what he is asking about—a creator who is bigger than the heavens and the earth, whom nothing can contain, being contained in something—this is not a "thing" in the first place.