Why is it that the biggest threat from terrorists comes from the UK?

If you look at a map of Europe, you will see that we are on its western edge. We are in fact its "wild west" where almost anything goes when it comes to allowing foreign ideologies to breed. Marx did most of his radical thinking in Manchester and London (he at least was the "good apple"). Cells of radical Islamists, Anarchists, mad animal liberationists, climate "warriors", fanatical religionists, etc., meet and debate and horn their arguments and polemics here. As for you yanks, don't you try to intimidate us. We don't have to be with you or anyone. Intimidating and telling others what to do is our job, not that they listen to us. We tried it on China, but we may have better luck with you ex-colonists.