Got to say, I disagree Rune.
I think all the name callinig and point scoring is a different issue. If you had two new forums, the chances are there would just be twice as many arguments going on in two different rooms.
Personally, my interest in these sites (although slightly biased towards the more "scientific" side) is pretty broad,and I don't think you can make such a neat distinction - I like to keep an open mind, and I actually enjoy some of the debates that go on here. Perhaps we just need to referee things a bit more effectively, and stamp on personal abuse when it crops up.