[Phocion]

Asians and Indians intermarry and assimilate into our European culture. Others don't/won't.

That's very stereotypical, on both ends. Chinatowns were often used as proof that Asians can't assimilate into the US, and I'm sure there are plenty of examples of people from your "other" ethnicities assimilating just fine.

[Meldrim]

I am not writing about individual cases, but the rates of intermarriage overall. Some groups assimilate well, others don't. That is no more up for debate than rates of unwed births, rates of home ownership, rates of completion of secondary education, etc.

BTW, who has used Chinatowns as proof of inability to assimilate? Thomas Sowell has used it as an example to the contrary.