Constantly in flux. Like the Himalaya are "constantly in flux"? It's a nice turn of phrase, well suited to delivering its devious payload. It might even work on somebody other than me.
There's a difference between cultural change, which of course is a reality, and an invasion of undesirables. The Nazis were undesirables, we all know what kind of cultural change they wanted to treat us to. And the Muslims are the same. Worse. At leat we had some commonality with our Aryan rivals. We have none with the backward Muslims. And go right ahead, claim the Muslims are enlightened and blah, blah, blah. Go for it. Fewer people believe it as more people encounter them. And try the racist angle - even though Islam is a religion - but I'll tell you I have nothing against individuals until I encounter them as an individual. And on that basis I can clearly see the collection of individuals that are here unwelcome by half the nation are deeply undesirable. Has nothing to do with race or religion, I use the world Muslim because that's what they call themselves. Couldn't care less if they were Martian, but it is highly undesirable to have them diluting and polluting the culture as it stands with their anti-cultural beliefs and behaviour.
By the way, there are many Asian and African and Caribbean and European sub-cultures that are integrated and accepted without a passing thought. Which only raises the question, if that's possible then what gives with the Muslims?
I'm being honest. You aren't. That's the main foundation of this debate. You want to be politically correct, I couldn't give a shit about that.