If the changes being brought to America now include specially protected ethnic classes and suppression categories like "hate speech" then the changes being wrought on America aren't worth it. If the arguments are based on Squatter Mentality and "right" of illegal entry, then they don't bode well for the country.
A nation is subject to physical limits - no nation has infinite room to keep infinitely importing people - that's a physical impossibility.
Too much of anything is bad for you. Ideals can't overrule physics.
National sovereignty matters - nobody should be force-fed immigrants against their will, and the intense browbeating and ethnic-baiting against immigration critics is an attempt to impose this force-feeding. It's beyond the pale.
With respect, what is your solution? Obama deported such numbers of illegals he was called the "deporter-in-chief" by advocates. He put special emphasis on "criminal aliens." Illegal immigration is generally down, and a significant part of it, overlooked in Trump's rants, are visa overstayers, not dark-skinned rapists from Mexico. Obama's DACA policy made sense, and if Congress doesn't legislate something, I predict Trump will do the right thing, or else face chaos.
My larger point is that there has always been a freak out by part of the US over immigration, with fears that today's newcomers are qualitatively different than yesterday's, which were qualitatively different than the day before yesterday's. (Look at the anti-Sharia law absurdity.).
True, globalization has led to capital traveling across borders while labor cannot and thus loses out. Trump was on to something, but is unlikely to support labor in ways that will make the jobs that illegals do attractive to citizens and residents, and thus less available to illegals, thus slowing migration. You are right about sovereignty and limits. But we are also addicted to cheap labor. We like cheaper meals in our restaurants, cheaper hotel rooms, lower construction costs, the subsidy that illegal laborers provide.
And who are the "specially protected ethnic classes"? The laws on discrimination are neutral in language, and were passed in the 60s, well before the latest surge in immigration. Hate speech will exist and be protected (outside some of the silliness on campuses I read about) so long as we have an ACLU. There will be tough judgement calls, but there have always been.
Check out "A Nation of Strangers" by Ellis Cose.
