Sure, there are reasons, but are they rational? Getting your morals from a religious book doesn't take rationality--it may be convincing, but it's not rational.
Look, I'm agnostic, or even more accurately ignostic. It is irrational for me to have this belief, but I ACCEPT that it is irrational. You seem to have a hard time accepting that about your belief, which is understandable, most people don't want to think of themselves as irrational.