These are just the right words: expected assimilation. And precisely because, as you put it, "those that continued to refuse would stand out like sore thumbs," they would not refuse for long. Together with putting a stop to illigal immigration, this would eliminate so many social problems.
Thanks for your comment and your welcome.
When one of them attacks you when you question Buchanan's views on race, ask them to point out ONE NON-WHITE ethnic group that he has championed for their 'assimilation into American culture.' I have never gotten an answer from them.