However he hasn't came up with a proof that can be tested to show that God doesn't exist or every aspect of religion is wrong.
Can you 'prove' that your thoughts aren't actually transmitted to you, via a method we haven't discovered? In Science you are expected to prove your theories not throw them out there and demand others disprove them. You can't disprove Christianity, but then you can't disprove Scientology or Pastafarianism either. There's no point in talking about religion in the terminology of science, unfortunately as you've got plenty of religious nuts trying to do that via creationism and school books full of blatant falsehoods to indoctrinate children many scientists come to see religion in general as a nuisance.