Yeah, this is a good point. There are many Armenian immigrants where I live, and there is no cultural divide. They work hard and are visible and upstanding parts of the community. This makes them American in many respects. I can walk into the liquor store and have a conversation with the Armenian owner and we can agree or disagree but at the end of the day, there is no cultural divide - only community and participation.

A weakness of American tolerance is that we allow cultures and communities to fester that become deeply and permanently antagonistic to our culture. The ones that tend to succeed assimilate culturally in reasonable ways, while still honoring and preserving their heritage and culture. It's just a fact and I think it's plainly observable in the US, Europe, and elsewhere.