Welcome to online forums.
The other thing is that the more you defend your position, the more you pound it into your own head. Deliberation and debate cause you to reinforce your own opinions. So people who were/used to be moderates become extremists when faced with a different opinion.
You can definitely see the level of maturity of many members who don't engage in that kind of bickering, by their silence. The bark of a single dog makes more sound than a hundred silent ones. So I wouldn't worry too much. If/when there is an original or important question then the people who'll reply will be there.