Don't generalize. Give strong arguments vs. only relaying your own experience. Otherwise, you are falling into a trap you yourself laid out in point #3 yourself.

Question is whether most Indians who come to US for work are actually upper class Indians already and thus this 90% number is what it is. Or do lower class Indians also come to US, face discrimination and thus either go back or struggle to find work. If the former, the issue is policies/attitudes in India which needs to be done better (easier said than done). If the latter, then we need to dig deeper.