But as I said, some nations do not have a process to revoke citizenship and a great many countries will easily accept children of citizens as citizens, even if they apply as adults and had never lived in the country. The US has traditionally looked down on dual citizenship but it is allowed.Most nations do not accept dual citizenship. So if you accept the US Citizenship, then you have to revoke the Citizenship of your country of Origin....
I agree with your major point about the idiocy of Trump's method and immorality and racist intent behind it but your line of argument about statelessness doesn't really apply (especially as illegals or even permanent residents will never had US citizenship so there is no reason to revoke their previous citizenship)