for any country with anything less than total opposition to immigration, your future demographics are indian. india has tens of millions of surplus men who are desperate to filter out into the wider world for money, status and access to women. if they are not killed at the border they will get in and they will make themselves part of the society and they will demand access to women and money and if they aren't given it they will take it by force, they are rapists and thieves and scammers, they are not going to stop because they were politely told no. they will go anywhere that has even a slight wedge for them to enter through.
United States