Ever see a bunch of guys get together and have hours of arguments over which sports team (you name the sport) is best. They will discuss all the different players and the coaches and strategies and talents of the teams.
I think they do it because they get a big charge out of the banter. From time to time I am one of them. I guess they just like the "back and forth". I have read pages of these "gun-fights" without posting, and sometimes I have to jump into the middle of it.
It is a messageboard. All kinds of discussions go on here, and some of them are bound to be "differences of opinion".
If I am interested I read it, if not, I just move on to the next thread.