Misconception, IMO. English colonists mixed with natives a lot. The early 20th century had a big wave of immigration from all over Europe, which altered the demographics here at least as much as the previous 400 years of settling and mixing. But since that's not taught, people think the natives just got wiped out, and that's not right.
Discussion
Not nearly as much as the Spanish did
Depends on the time period and specific place. The main reason the Latin American countries received fewer European immigrants is because they mismanaged their economy so bad. Nobody immigrants so they can be poor
I mean, in the Americas. I just noticed Belgium there... Yeah that one is right.