I agree with you on all your points, Frink. You seem to be a fair minded agnostic.
I would only make an addition, and that is the point that atheists, agnostics, and anyone else CAN be dangerous as well. People can go from reasonable to zealots over the most varied issues, even those that do not involve any religious reverence. Something that a certain OT fellow whose name escapes me seemed unable to accept or confess.
Though we see differently on a number of issues, I'm always happy when I can be respectful as I disagree with my debate opponents.