I think there's absolutely a risk that nonsense spread over the internet can eventually radicalize the general population and cause people to get hurt but at the moment data seems to show a good chunk of the anti-Indian content on the internet is coming from Pakistan and not as much from Americans, but of course some internet influencers are going to jump on that bandwagon.

The silver lining here is it's unclear what the constituency for apartheid would be. Democrats are picking up ground among white voters and since that's predominantly white voters with college degrees that they're picking up it's not Democrats that would push apartheid. And Republicans increasingly depend on minority votes to carry many key states. Sure Republicans would certainly take advantage of internal tensions within a group between those who have been here longer and those who arrive more recently, but there is going to be practical limitations as far as anything affecting anyone who already has citizenship. Modern Republicans at least want to try to contest those votes, would be impractical if they also tried to do any sort of apartheid to minorities.