What do you think would happen if there were open borders? Would the US see net inflow or outflow of populace?

Passive-aggressive nonsense elsewhere, please. If you've got a point or comment, that's on-topic, just make it.

Was an earnest question, and related to the topic at hand. How would people vote with their feet?

I genuinely believe that you're not asking that question in good faith; I believe that for whatever reason, you have some issue with my assertion that some people want one kind of society in the US and some people want a different kind (nothing wrong with having a different opinion), and I genuinely believe that your question is, rather than an honest question on that topic, some kind of sideways attack on this, perhaps based on the practicality of maintaining a decent society, but without actually stating your case such that it can be discussed.

Part of this belief is based on the fact that your question is a fake question (and that when it was clear that I was suspicious of your motives, you simply repeated it without any amplifying remarks - you knew I didn't understand, but you didn't do anything to help me understand you). That the answer is apparent to everyone involved, but drawing our attention to that answer doesn't actually add anything to the conversation. If your fake question did actually add to the topic, it would be a useful rhetorical device, but it doesn't. In effect, you've stated "people want to move to the US" and... that's it. How's that relevant? I don't think it is. I think it's just a veiled attempt to derail.

As such, I choose not to engage. If I have mistaken your intentions, I do apologise, but that's what I believe. In that case, at least now you know why I think you're acting in bad faith.