> Perhaps the "brown" people can work on fixing their home countries so that they wouldn't have to emigrate in order to enjoy a better quality of life.

That's an ignorant thing to say. Even in democratic western countries, it can be very difficult for the average person to institute change even at a local level. If you have to battle corruption or war on top of that, it could be impossible. For example, would it be fair to say that a Sundanese villager should just fix their country as PMCs being hired by the UAE(and others) are committing genocide? Or would you consider that reasonable to flee the country in search of a better life?

We have to admit there are lots of cases where people can't just "fix" their own country as there are complex geopolitical issues that a normal person, or a group of normal people are not able to fix. If Americans want fewer "brown" people in their country, the idea should be to promote global economic and political stability so that people can reasonably make their countries a better place, not to just tell them to go away and fix their own problems.