When you look at the British Empire and then see the countries that stemmed from it, there is one feature shared between most of them (especially the ones with higher amount of white immigrants): racial segregation. The United States, South Africa, Australia, Canada...
Many people could say that racial segregation is something from the past and it's not longer an issue, but unfortunately it's kind of obvious that racial discrimination is still a thing in those countries (even within the United Kingdom).
If you're from one of those countries, why do you think this is happening? Is English culture intoxicated with racism? Is it due to a narrow-minded imperialistic mentality? Do you believe white native English speakers see themselves as superior?