There are a lot of individuals writing on this forum. Expecting all to be open minded, expecting all not discriminating, expecting all think like you is by far too much.
You will find all kind of people here, some nice, some rude, some helpful, some trolling, some discriminating, some not. So what? That's how the world is, after all. Learn to pay attention to only what you find useful for yourself and ignore gracefully the rest. Of course, you can start disputing ideas too, but don't expect that always the smarter argument wins (again, like in real world too, some will not accept that argument no matter what).
All in all, it's a good forum. The variety is just spicing it up a little. Enjoy your raid here, if you'll stay long enough you'll probably find your way and you'll like it.