Okay well I'm an evolutionist, my argument goes like this:
-The bible was a book created by man, man created a God, so how could a God create the universe?
-Steven Hawking also just proved that there was no time for a God to create the universe (look into it more because it's pretty complex and a lot to explain right now)
-There is evidence to evolution, similarities in genes, bone structures and behavior among animals
-Evolution happens not just in genetic make up, but in the world around us. Just look at how far we've come, more educated and pushing ourselves further.
-There is fact to back up evolution, but there is no fact to back up religion
-Creationists claim that the evidence that they have is the bible, but the bible was created by man. Fictional books cannot site themselves, especially if there is no evidence, fact, or even an experiment to prove anything.
To sum it up, religion is created by man, therefore opinion. Science is a study, it's fact.