>>17918677
What is moral for one group of people is immoral for another.
Mexicans come into my country illegally because they make more money than the average American by being paid under the table; that is moral for them. Conversely, mexicans coming into my country means that I have a harder time competing for livable wages and affordable housing. That is immoral for me.
Betraying your home, your country and your people is just about the most immoral thing you could do, because you are acting in complete opposition against your own interests.