Just think of anything that has been claimed by atheists/christians against Islam and just know that muslims have already debunked it.
https://www.youtube.com/watch?v=WKYZDMnQHAAAnd even in the muslim/christian debate scene, whenever there is a big debate, christians literally have to flood the comments under videos as soon as they're posted because they know they don't have a chance.
Last in date:
https://www.youtube.com/watch?v=rrVri160g8M