High estimates put the Muslim population in the UK at around 2.4 million out of a population of over 60million. Of that 2.4 million I have no idea how many would fit your definition of 'extremist', but dont let the truth get in the way of the scaremongering of course.
I'm no fan of extremist Islam, but the problem with people like you is that you dont see the difference between Islam, and extremist Islam. I have several colleagues who are Muslim, one of them is pretty devout. He attends mosque, doesnt drink or do drugs, plays football (soccer to you guys), likes music...just a normal guy who happens to be Muslim. I have a hatred of extreme Islam which would probably be equal to yours. When we had people on the streets of London demanding 'death to those who insult Islam' after those cartoons were published, I was disgusted
but it was a group of about 20 morons
so unlike you I am able to maintain a sense of perspective. When the UK was being bombed by the IRA in the 80's and 90's
would it have made sense me to hate all Catholics? No, because I realise that people that agree with this kind of thing make up a tiny minority, no matter what your extremist christian blogs tell you.