To be honest, I don’t really care what the rest of the world does. When we do the right thing, the world generally follows anyway, but even if they don’t we are free to go our own way. But the rest of the world usually follows.
Our guide for federal action should as it always should be, the Constitution as written and originally understood and intended and court cases that have applied in good faith the Constitution.
If it is still unclear, then the Constitution does clearly say that Congress has the power to uniformly set laws for naturalization (Art I,Sec 8,C l4). No need for a Constitutional amendment as I see it, just Congress deciding how to handle this issue.
Well, this background primer is much more than a global comparison. That’s an inadequate title. The article provides a significant amount of information about both “sides” of the debate. I encourage you to read it as time allows.