I for one am weary of the trope that simply we are all children of immigrants. Thus the more the merrier. Just let those in that wail at our border today. Well, yes and no. Not quite the same thing. Because this is the difference.
From the cesspool of foreign soil come our neighbors from the South. Bringing their virus of social unrest to the land of opportunity. Once here, they prosper. In return for our hospitality that comes in the form of healthcare, education, living expenses such as housing and food, their virus of social unrest re-emerges.
Not content with the success at life they now have, they turn on their benefactor. They would have their host destroyed. The very system of government that gave them so much must be overturned. They would have America turn into the very cesspool they chose to escape.
One more thing. Sure, bring it along.