nunqual said:
Why do you think that is? Why are humans naturally prejudiced? Sorry, I'm having a lot of questions in my head. You can treat that as a rhetorical question if you like.
It probably boils down to the old survival instincts coupled with the human species incredible sense of self importance.
Simply put, anything seen as different will be viewed subconciously as a threat which has the potential to change the social structure of any given group. Our social nature was our biggest asset to survival over the years, to the point that when even now, when we live in a global society, people still seek out like minded individuals or causes to join up with.
Look at the Escapist. It's a pretty liberal place by any standard, centered around a mutual enjoyment of videogames. Debates may occur but generally the user base of the Escapist is agreed on most aspects of morality/ideals and so on. Now throw a rascist into the mix. The group as a whole will see it as something which is different/unwelcome based on its own group standards and it will quickly be taken out of the picture with mod wrath.
Now take a white power website, everyone there is based around the same ideal. An escapist finds himself there and offers his/her own opinion which will contrast greatly with the existing opinions of the user base and will be dealt with and banned so as not to cause more disruption.
This happens on a larger scale aswell. Something is seen as a threat, it is circulated amongst the masses so it is at the forefront of social conciousness, which then moves against the now "undesireable" element. Look at smokers. 50 years ago people didn't bat an eyelid, it was seen as a social thing to do. Now, we are told repeatedly that it is bad, the majority take that on board and as a result begin to ostracise those who still smoke.
I know that was a ramble, it's 4 am so I'm not all together, but essentially, people are predjudice to preserve the stability of the current cultural norms.