I imagine that it's mostly that folks like folks who are similar to them: similar philosophies, similar religions, similar classes, similar incomes, similar fam

I imagine that it's mostly that folks like folks who are similar to them: similar philosophies, similar religions, similar classes, similar incomes, similar families, similar physical types, similar habits &c. The unfortunate thing for you is that much of America is dissimilar to you. That says nothing wrong about you (or about much of America) — it's just a fact. It's tough for anyone who's outside the norm (again, no fault attached). You might have some success looking for others who are similarly dissimilar. Perhaps there are meetups for expats from your region of the world in your city? Good luck!