Since you have such a huge problem with Muslim migrants and refugees, why can't you rein them somehow?
Is there some sort of high religious authority in your countries that can tell Muslims that, say, the West is not the enemy or that Shari'a in Europe should not be implemented? We have the Grand Mufti of Russia, which is pro-Put in and regularly condemns extremists and the like. He is s public figure much lIke the Orthodox Christian Patriarch and the Buddhist Elder Lama, and answers to the government.
But it seems to me that in Britain and mainland Europe you have no control over Muslim clerics in your country. Why haven't you tried exercising it? Why can't you instate the pro-EU Muftis of Britain, France, Germany or Sweden, and then use them to condemn the Shari'a police, the extremists and the rape gangs? Surely there must be at least some Muslims in Europe that have lived there for long enough to accept European values.