This has been a very interesting debate.

Jim - calm down.   Here are some questions
"racism, like any other disease". How is racism a disease?

"There can't be too many here stupid enough to believe that the British establishment is so supportive, or so frightened of the immigrant communities as to keep silent about such a crucial issue." Why is it stupid to believe such a thing?

"It seems obvious to me that it is attitudes like Keith's that are far more responsible for keeping the lid on the situation than the PC that usually takes the blame." I don't follow your logic.

"there are those among us who appear to know better than their own 'experts', and apparently won't be happy until Powell's "rivers of blood" are flowing through Britain." I think you're saying that if Powell was right, the people to blame will be the ones who expressed their concerns that it might happen.