And yet somehow that makes it not worthy of awareness and fixing? It's a very odd argument to make.
rayiner's comment about 90% of Indian-Americans not thinking discrimination is a big problem is about perceived racism from non-Indian Americans. If you read the link it's about racist Twitter posts about an Indian American by what looks like white folks. No mention of caste. Nothing about internal casteism in the Indian community.
I say this as a HN'er but sorry HN can be just dumb sometimes.
At the very least, it might mean you don’t bring in an activist that antagonizes members of the majority group, as was allegedly the case here.
Activism undertaken on behalf of a minority group affects the relationship between that minority group and society as a whole. All members of the group have a stake in the overall relationship between the group and other groups.
This the discrimination problem -- if you are not in the minority, it is much more difficult to appreciate how common it is.