That's all well and good, but you missed the fact that what made SFO the melting pot that it's known for today was a liberal immigration stance and an egalitari

That's all well and good, but you missed the fact that what made SFO the melting pot that it's known for today was a liberal immigration stance and an egalitarian mindset. What you're describing is conservative immigration and a preservation mindset, which is fine, but the opposite of what made San Francisco, San Francisco. You can't have your cake and eat it too.