Hi,
I think its a good start, but here are my suggestions:
Para 1: there is something abrupt about this paragraph. Although Dalit is a fairly recognizable term in India, you might want to contextualise that a bit. "The houses we built could provide shelter from heat and rain, but not this crime." -- rephrase this?
" I aim to pursue a career wherein I can combat those criminals who operate outside national (and moral) boundaries." Very interesting, but can you elaborate a bit more on this, perhaps?
Para 2: I think its an excellent fit paragraph that should technically come as the last part of your SOP.
Para 3: I am just thinking aloud here: But I have heard that the status of the Burakumein is very similar to the Dalit status in India. Perhaps you could link both of them and perhaps, then talk about the States and Asia as being members of a global community. Also, three or four lines describing your future goals. I am not sure whether you want to get into policy making or if you want to work with NGOs from your SOP.
Good Luck!!