Why wouldn't I? I want the best standard of living for myself and my family, with the best opportunities. Why would I stay somewhere that acts counter to that?

Thats something conservatives are usually accused of saying.

I'm not sure why that's something that would be of concern to me.

US is built on the brain drain from Europe(post ww2), India, Eastern Europe and other countries. Making it hostile for minorities and immigrants will cause the reversal of this.