This is one failure mode of an open-ended immigration system. If you admit large numbers of migrants in a short amount of time, they cannot possibly assimilate

This is one failure mode of an open-ended immigration system. If you admit large numbers of migrants in a short amount of time, they cannot possibly assimilate quick enough to avoid forming cliques and bringing with them certain problems from the old country. If these cliques and problems are big enough, they attract the attention and ire of natives and other migrant groups, and you wind up with new problems. I don't know what the solution is. As a non-Indian tech worker in America, I've had great 1:1 experiences with many Indian co-workers, but I've also heard of and witnessed many of the problems described in the article.