Honestly I can attest to this from big tech. It's anecdotal but my experience is that Indian engineers will self-organize into their own teams, start bringing LOTS of people on both remote and in-sourced, and effectively push anyone out who's not Indian by implementing super authoritarian leadership structures where everyone's vague on their standing in the company.
Those leadership structures often push non-H1B visa holders out because the quality of work plummets, and they don't want to put up with VERY terse management (ie: the type that will call you at 10:30pm screaming at you because your overseas Indian counterpart can't read the English documentation you wrote and now it's your problem).
I've now seen this at one old-school Midwest aeronautical corp, one startup trying to save costs, and one "big-tech" bay area company most people would recognize. This article very much speaks to me on something I have seen in my life.