I'm one of those british whites and I couldn't care less. I've had people be racist to me before but hey you give what you get. Me and my friends trade racist banter all the time, race really isn't a big deal.
I'll say something x tamil friend looks like y tamil friend because all tamils look the same, then I'll get back something like all white people are posh etc or welsh people copulate with sheep.
To put it bluntly, race really isn't a big issue and we trade racist insults just like any other banter you would trade with your friends.
I think people care too much about race, for me it really isn't an issue, well at least not in my area. Its such a petty thing to care so much about, the colour of someones skin or their ethnicity.
EDIT: I will admit that jewish people do probably get racially abused in my area however, if you score a cheap goal in football someone will shout " get the tora out" and "jew goal", regardless of their being hardly any jewish people in my school/