If this is real, it's purely brown-on-brown crime because non-indians have no idea wtf a caste system is. You all look the same to me.
Which leads me to believe that this can't be happening on any systemic level (I did read the article, so yea it does happen but I can't believe that it happens a lot).
"Caste-ist" indians simply don't hold enough sway in hiring decisions in the US to make any significant dent. If lower castes are being oppressed, it's only by their own cultural attitudes. Just start making more non-indian friends and assimilate.