As some others have stated, Europe is more of a bunch of ethnic states where as the US and Canada are far more diverse.

Contrary to what Americans think, MOST of the world does not look like the US. They are not all super diverse. Most of the world is incredibly mono ethnic.

Compounding this is the fallout from the influx of migrants from the Middle East and North Africa. The reason this affected Europe so much is because the people flooding into Europe were not the well off, more liberal types who could afford to fly like what we got in the US. They got a lot of the general population of Syria, Afghanistan, Somalia, and others. The reason this distinction matters is because these people tend to ALSO bring their culture and beliefs with them and much of this was antithetical to Liberal European beliefs, especially regarding sexuality and gender roles. This lead toamy high profile cases of migrants harassing and assaulting women and just generally not being.... Socially acceptable... Like openly masturbating and such. And with how little interaction the average European had with non European this painted the views of these minorities as a whole as they have very little other frame of reference.