If someone does something wrong, don't bottle it up letting it fuel hatred of an entire group of people. Recognize that the troublemakers are individuals and are not representative of any large group. If you really want to improve the site, confront the problem on an individual level or alert the mods. If a user is truly wrong, then you should have no problem listing reasons A, B & C about why he is wrong. If you cannot give any legitimate reasons about why a person is wrong, then you may not be able to accept other people's opinions. Sit down and be honest with yourself and your own feelings.
Really, all you need to do is when you feel upset by a post is:
1. Ask yourself why you feel upset.
2. Ask yourself if that is a valid reason to feel upset.
3. If you answered yes, then articulate your feelings directly to the troublemaker.
4. If that doesn't work, then alert the mods.
This reminds me of a thread I made earlier for this very issue.
