Madison, in considering whether the legislature should be limited to native-born citizens, had this to say:
"[T]he door of this part of the federal government is open to merit of every description, whether native or adoptive, whether young or old, and without regard to poverty or wealth, or to any particular profession of religious faith."
There may be countries in the world that don't have a moral obligation to allow people from different cultures and religions (I'm avoiding "values" here, since it's a squiggly concept). But we're not one of them.
"[T]he door of this part of the federal government is open to merit of every description, whether native or adoptive, whether young or old, and without regard to poverty or wealth, or to any particular profession of religious faith."
There may be countries in the world that don't have a moral obligation to allow people from different cultures and religions (I'm avoiding "values" here, since it's a squiggly concept). But we're not one of them.