People mostly get mean" when you start to ask questions about sensitive matters, without being sensible and sensitive yourself? E.g. I saw your post on "Why everything that comes out of germany is Evil?", now if i was German, and I was thinking that you are not, which you probably aren't, it could happen that I just would want to kick you hard enough to make you shut up!!!
You could have refolmulated your story as: "Is there any reason why Hitler rose to power in Germany, and why the people of his time actually supported his outrageous plans for the future of the world, while in most other countries of the time, extreme right-wing beliefs were shunned by most of the populations?" and there would be a good answer to that in the political QA section.
The way you asked your question however, you only deserve the answers you got.
some guidelines for you:
1. Don't ask questions that are too general: e.g. "Why is everyone here mean?!"
2. Don't talk about sensitive matters, e.g religion, beliefs, politics, unless you are prepared to do it maturely.
3. Do not ask questions that are not questions. e.g. "Why are followers of the religion XXXX so nasty, and why do they piss me off, and why are they all terrorists?"
if you do any of the above, and you have done them all, expect most people to be mean. actually, i have so far only gotten good answers, and a huge majority of people here are really helpful if they find a question to be informative and intriguing.
Thanks everyone for this great community. And to you Heather, I hope you grow up and learn to improve, instead of blaming others.
In Love and Light.