Hate is against the golden rule - anyone who starts hating on those who don't follow it isn't actually following it in the first place, so they're just as bad as the bad ones now.
I meant to reply to this earlier, I apologize for the double post.
Your post, if you'll forgive me for calling it this, is naive in it's rationality. In a perfect world that would be true, but we're talking about irrational people, who have such faith in their absolutist ideas that they believe they're here on earth to do God's work, and so his rules don't apply to him. Like I said, it is why people who quote the Bible and say "Though Shalt Not Kill" to women having abortions, will turn around and kill abortion doctors, or strap a bomb to themselves. In their mind, the need to do God's work supersedes the need to obey the commandment against killing.
We're not talking about your average run of the mill religious person, who takes their sacred texts as a whole, and probably not literally. We're talking about people who will pick and choose and become blind to everything that argues against what they do, even if it's from the same sacred text.
It's unfortunate, but true, and it applies to just about every fundamentalist nut out there, of any religion (hell, there are secular fundies too, same rules tend to apply).