There's a difference between the posters and the forum. The actions of several posters is not "the forum". If you say something and I question it in a way that hurts your feelings, that would not be "the fault of the forum" - that would be me. It continues to be individuals, and not the forum, even if two, three, or three-hundred other people also question your statement in a way that hurts you, even if it's the combined response and not any individual comment that wounds.
There are ways to phrase things but there are also ways to say "hey, I think you phrased that badly. Here's why, and here's a suggestion of a better way to express such things in the future." Further, depending on where you live in the US, depending on your news-media *cough-Murdoch-cough* exposure, it is entirely possible to think that 99.9% of the population believes as you do. As someone who grew up in a very liberal part of the country, I can assure you, the reverse is also true. Again, there are ways to react and community-build and ways to alienate.
I think this community tends to stomp pretty hard on conservative viewpoints and that this thread is an example of it.