"Being rational means that our belief is commensurate with the evidence" Very true. But being rational is still a belief in itself though because you are trusting that something is true but under the view of verification. Not everyone sees this the same way obviously. There is always the case where "evidence" isn't totally believed or even explainable.
"Therefore theism is irrational." That doesn't mean it's irrational just because there is no refutable proof. If God exists then belief in him is rational. If he does not exist, then it isn’t. No one knows whether he is real or not but people can believe he does or he doesn't. To say there is no proof is a belief but a logical one because while there may not be refutable proof some still believe there is proof.
"I still have no idea what your OP is about. Why won't you tell me?" Look, cofty, I've already tried to explain this and I'm not going through that again. If you don't understand, you just don't understand. Don't be giving me headaches, I'm just a boy.