I have posted for years that “two different cultures cannot occupy the same space” any more than can two objects. Two years of Latin in High School left me with some idea of what happened to Rome. Like you, it became aparrent to me years ago of the conflict that is seemingly inevitable in our future. Some months ago it occurred to me that my assumption at the beginning night be wrong and maybe there might be a way for to cultures to occupy the same space. Distinct economies would be a fundamental requirement. I conjectured that we could have “Blue Dollars” and let them have their “Red Dollars” (for the commies they are). Patriots would only take or do business with Blue Dollars and Progs would only deal in Red Dollars. No way it would be stable but it would allow a degeneration of their culture of no values while leaving ours almost unscathed. Something to ponder, anyway.
Simply reduce the leftwingtards to slavery and you can do anything you want.
Your thesis is very similar to Bill Whittle’s concept of creating a seperate economy/culture. It deserves to be debated and considered. Interesting.