As someone else said, I'm not really shocked by racism anymore. It's rampant on the internet. I mean, it does make me angry, but I'm not going to go around looking for it so I can yell at people, becuase it doesn't really do any good. They're not going to change their beliefs because of someone who yelled at them on the internet.
Anyhow, about the site you posted. I didn't look thoroughly, but I couldn't find anything that racist. I went straight to this thread:
Is it wrong for a Desi girl to....
It's about dating outside the culture, so I thought it would be a good candidate to find what you were talking about, and while some were vehemently against dating outside the culture, most people were open for rational discussion.
If that's the type of thing you're talking about...well, some people feel strongly about intermarrying. Doesn't neccesarily mean they hate other cultures. Just...don't want their children to marry them (mostly out of concerns for preserving the culture and values of the religion).
Um...but if you can link us to an actual thread that shows us what you were talking about, you'd probably get more responses
*edited* For a reallly dumb typo