Frog, the same reason you don't find "love" on the political sites. People have different opinions. Some claim ownership of a forum. "Discussions" get heated, then people get "personal", then some get "threatening" to others. Some can handle it, some can't. If you have "thin skin" none of these forums are the place to be.
I agree. You won't find too much civility on a political site. And that is why we are in such a sad state of existence in this country...in the world really. If we can't discuss and negotiate what policies are in place that is bad enough, but it is established that the norm on a political site is nastiness. Why would anyone be surprised that our leaders can't solve anything if no one can have a civil conversation?