Okay, I normally like to stay out of these discussions so I can moderate instead, but this is ridiculous.
1. First, unless you want to start a mercantilism-esque trade war, "make Mexico pay for it" isn't really feasible. Second, more people are going to Mexico from the US than are coming to the US from Mexico. Building a wall would be a rather pointless waste of resources. See http://www.pewresearch.org/fac...
2. Catch-and-release was used because it costs a great deal of money to imprison, house, try, and deport illegal immigrants. You need to do due process to avoid violating the constitution. In America, you're innocent until proven guilty - and that applies to people suspected of being in the country illegally. You cannot strip the rights of somebody because you *think* they don't have them, otherwise those rights are meaningless. If you want to end catch-and-release entirely, be prepared to spend a lot more money on law enforcement and the INS.
3. There are constitutional reasons why you can't compel the state law enforcement to do things. Also, DACA/DAPA (which is what I assume you mean when you refer to "Obama's deadly policies") didn't allow criminals to stay; if you had any serious convictions (any felony, any serious misdemeanor, or 3 misdemeanors of any kind) you weren't eligible.
4. Again: Constitutional issue. We preserve the right of law enforcement agencies to enforce laws as they see fit; "sanctuary city" is simply an extension of that. Sanctuary cities aren't "safe havens" for illegal immigrants. They're simply cities where the *local* law enforcement will not assist with matters that consist only of immigration status violations. The federal government is welcome to conduct their own operations, as is its right.
5. Sure, you can revoke DACA/DAPA - but be specific, it wasn't amnesty, it was an executive order to provide a temporary stay of enforcement. Amnesty is a different word that has a very different meaning.
6. We... already do? Visas aren't issued blindly, and their requirements are based on nation of origin. See https://en.wikipedia.org/wiki/...
7. This is a concern only with a few nations (mostly in the middle east) and I actually agree.
8. This would cost tens if not hundreds of billions of dollars to set up and operate. We're not Israel; we don't have a single major point of air entry and a few heavily controlled land entry points. It would also not be terribly useful, because unless you're willing to track people once inside the country (and that opens up a whoooole different can of worms) it's not going to do a whole lot. You know person with X biometric data entered the country, great. Now what? They've moved and dropped off the radar. Good luck catching them.
9. The only way to make it not attractive to work here is to lower how much American companies pay, and I for one do not approve of dragging our standard of living down into the mud in order to accomplish that. You can punish companies more harshly for using illegal immigrants as labor, but making it objectively less attractive to work here isn't really feasible.
10. Which historic norms? Immigration's been pretty steady for the last twenty five years, give or take, so immigration as a function of population size has actually *dropped.*
America's problems (well, most of them) aren't because of immigrants. The real issues facing American workers stem from the ruination of unions in the 90s, the increased automation of the last 50+ years, and the willingness of other countries to not offer high standards of living for workers. The problem isn't going away, and blaming immigrants for it isn't going to fix the issue - especially when we have a ticking time bomb in the form of driverless trucking no more than a decade away.
Trucking employs about 1.8 million people, and contributes about ~700 billion to the economy - a bit under 5% of our GDP. It's also going to be gutted by automated vehicles. That's a crisis that we can already see coming, and there isn't an easy answer - because "just get a new job lol" isn't really workable for everyone involved in the single largest field of blue collar workers left in America.