Thanks for your hypothetical discussion, but there are real Cubans *today* who are escaping from Cuba and our response to them has very real electoral consequences. If conservatives were to block these refugees from gaining residency about 1 million Cuban-American votes for Republicans in Florida would vaporize instantly. This would give Florida to the Democrats and could very likely put Hillary in the White House.
And if Republicans allowed in one billion anti-Communist Chinese and gave them all citizenship, I'm sure the GOP would win every election for the next sixty years. Don't talk to me about the political situation -- please explain to me instead the difference between China and Cuba.
I've got a question for you under your scenario. The Cubans have Florida, according to you. The Mexicans have California, Texas, Arizona and how many more states. The Muslims have Michigan. They ALL have to be "appeased" to get their vote.
The question. At what point does the "appeasement" stop? When every state is "owned" by some foreign enclave of immigrants? Not many left. And the few that are left, no politician gives a damn about.