In the US, caste is mostly a made up issue. Most 95% Indian Americans are upper caste or rich land owning OBCs (like the professor who wrote this blog). Who exactly are they discriminating against then?

Lot of grifters like Equality Labs have made this issue in US bigger than it seems. Most Indian American kids probably don't even know their own caste.

They may not have talked about it to you, but that doesn't mean they didn't talk about it at all.