britexpat,
They do evolve, but because of their human rights conscience, they have welcome certain ideologies that are now attacking those who welcome them and are slowly killing that evolution in the name of their agendas.
Britain and other European countries should have adopted the same religion freedom policy as Saudi Arabia has.
You being a Muslim and son of immigrants, would most likely not be able to feel the consequences of the fast spread and unwanted ideology like the native brits do (as this ideology is intrinsically connected and often confused with your religion).