I actually agree with the first part (ending all immigration) and disagree with the second part. I support an immigration moratorium, and tax incentives for having more children. I would basically tax higher single men and women and apply credits to families with more children. 

Don't want to jump on anyone's toes but I believe the concept of jobs or at least the understanding of that concept by Americans is really outdated.

With the right system you can actually encourage people working 30 hours a week max. In the USA people officially work 44 hours a week (which to me is already crazy) but in reality more around 47 - 50 hours.

I do expect an average of 40% time reduction to only impact productivity around 25%. That on its own should add a couple million "jobs". People should keep the same pay of course. Let's say you worked 40 hours a week and earned 2500 a month then that 30 hours a week should keep the same. People will have more time for their kids, community activities, volunteering and actually focus on meaningful things at work.

Then make sure people have affordable up to free healthcare for everyone, readjust federal budgets and don't have crooked company monopolies increasing prices of basic things like rent, internet and utilities.

Also ensure private equity companies aren't ruining communities, business etc. and the US can become better.

I suggest to re evaluate and be critical to what you currently know and understand. Society should change completely to have human advancements and to support more people (up to a certain point)

This is exactly what we have in Germany. Still, the native population keeps shrinking.

So the politics is raising immigration, in the worst possible way. Uncontrolled.

Supposing we could even implement this kind of thing, even have it be effective _and_ no other bad side effects that are worse than the original problem.  Supposing all that it would take generations to come to fruition and finding out how good or bad this was.

There are many single people with a low income that already have it hard as it is without those extra taxes for not being traditional,i would like it so much more if more orphans were emigrated to have a better life in countries that are not war ridden etc...

YES!

There's no legal way to stop it.

Germany is bound by EU law (like every other EU state) so they can't just ignore freedom of movement. The majority of immigrants come from other EU countries (mostly Eastern Europe).

Same is true for the right of asylum.

"Downsizing" the U.S. will not make it better. You will still have KKK members, neo-nazis, and alt right conservatives living here

It’s pretty wide open in my state of Utah.  Almost half the state is blm land... pretty much the same with all the surrounding states too... so depends what part of the country you are talking about...

That is for certain. Unfortunately, we as a species tend to cluster in coastal areas and highly fertile, humid plains, both of which are biomass and biodiversity hotspots. And we also got everywhere instead of living in just a few dense regions.

If we all decided to build cities in deserts and also grow our food there, our ecological footprint would be several times smaller. Plenty of cheap solar energy as an incentive too.