I also tend to imagine that those in academia are considerably more likely than the general population to reject racism.
I've heard of numerous cases where Indian-Americans didn't know their caste until they were asked about it by people not of Indian origin, who seemed to have the 4 caste + outcastes model in their heads, which barely maps to how caste is understood in modern India.
(Parents came here from India in the 1970's).
This may also differ by generation.
I am not denying the presence of discrimination in North America. I believe it exists.
For example imagine people who have tattoo on right hand discriminating against people who have tattoo on their left hand or people who are members of Libertarian party discriminating against members of green party.