Multiculturism is pie-in-the-sky when we're talking seriously contradictory core beliefs.
I personally know tons of immigrants from myriad different cultures/countries who have become terrific Americans... but they are "all in" on modern life in Western societies.
But we have also let in a gazillion folks over the past few years whose mindset is decidedly unfavorable toward the modern world... and they are not remotely open minded or amenable to change.
I'm generally pro-immigration... BUT only on a highly selective basis.
“Assimilation”…Trump’s approach is not a good example…