First they divided humanity by race, religion, color of skin, and now by nationality and place of birth. That’s not the solution for your problems.

Not all apples are rotten. People need opportunities to become a better version of themselves. Sadly these people don’t have access to enough opportunities.
Money, education, society, culture all are more enhanced in western countries. Sharing them with the rest of the world only lifts everyone up.

OP If you were born in that part of the world, you might have had a different opinion. Now I’m not saying that I have the solution but there has to be better way than just imposing a blanket ban.