To begin with, faith isn't just about belief, it combines the concepts of belief and trust. For the purposes of this discussion, I will be focusing primarily on the second attribute.
It is not possible to trust somebody until you first show that they exist.
Since there no evidence that the god of christianity exists believers use faith to fill the gap. Faith is pretending to know things that we have no evidence for.
We can show beyond all reasonable doubt that the god of Jesus is impossible.
"Well, either way, you have to have faith either in a creator or in the process of evolution because you can't observe that either."
Yes people who know absolutely nothing about the evidence for evolution do like to say things like that. Don't fall for it. Evolution is a fact....