I think they want to invite islam into our culture as a way of getting rid of Christians and Jews and Western culture.
I think the Left believes it can live comfortably among muslims because it believes it--the Left, that is--will control the government and the government can keep islam in check the way Turkey has kept it in check.
They live in bubbles with no connection at as to how real people have to live and suffer in the real world. They live a life that very few can imagine surrounded by extreme exalts and armed protection 24/7 living in palaces which makes for very arrogant, narcissistic, and unpleasant people.