Gay rights discussions: Why do people get bent out of shape?

I don't think there is any topic that generates more online discussion than gay rights issues. This isn't just a Bermuda issue, as I've seen it in discussion boards based in other regions. Why is it?

Is it because it brings in the religious crowd, the politicians seeking votes and every Tom, Dick and Harry with their own interpretation of moral standards or the Golden Rule?

Politics, wars, community violence, heck, even celebrity 'news' pales in comparison. If someone prominent in society comments on gay folk, people en masse will pile on the debate (or chaos, whichever term you prefer to apply).

All I know is that my hit count would quadruple if I started a post with Leviticus 11 (18? 20?... oh, whatever chapter the 'abomination text' resides in...)