Oh my bad, since you mentioned American tourist visas I assumed you were only talking about America. I have not been following similar laws in other countries, maybe their motivations are different than the American intentions of completely shutting off immigrants from the USA.
That's very typically American. Being so focused on America without understanding that the choices of the American government have huge consequences for the rest of the world. You keep saying that this is all about the Trump regime keeping foreigners out of America. And that is true. But that is not the big picture. As an American you should be more worried about whether you will be allowed to leave your country, or go anywhere else when or if you want to, once America sets this precedent.