Complex sentence: After World War II, South Asians continued to migrate into the islands, most of which assimilated and avoided the local social stigma instilled by the early Spaniards against them by keeping a low profile and/or by trying to pass as Spanish mestizos.
Split into simpler sentences: After World War II, South Asians continued to migrate into the islands. Most of which assimilated and avoided the local social stigma instilled by the early Spaniards against them by keeping a low profile and/or by trying to pass as Spanish mestizos.