Ok, but it's not just London, what about towns like Bradford?
There was no problem with Muslims in many of the UK cities, until the late 80s and the Rushdie affair. The pre 1990 racial problems were all black related. As that stopped, the Muslim issue started.
The failed policy of multiculturalism, allied to left wing politics and social policy/brainwashing, means that radical Islam groups went unchecked through the 1990s, lest the charge of racism be shouted back. People think Muslims have been a UK problem, but its really only been in the last 20 years. Its a problem tats solveable. Tne UK is both small and large enough for problems to forment and solutions to work.
BTW, I don’t all Americans are silly, I meant people who have a far too stereotyped view of the UK (and that’s not exclusive to the US): people who really believe all Scots wear kilts and live in castles or all English wear bowler hats and know the Queen.