The problem is they have no allegiance to this country.Being illegal aliens themselves they are supporters and sympathizers with illegal aliens even to the point of smuggling other illegal aliens themselves.
All I can say is that is not what I find here in southeastern WA state, migrant worker (and stayer) country. In fact, the kids tend to identify with USA symbols at sports and stuff. I know many of them. They actually reject the Mexican culture because that’s their parents “old stuff”. This is the only country many of them ever knew. None of these kids are involved with smuggling illegals - I don’t know what you’re talking about.
What I see is that the older teenagers and young adults coming across are the ones bringing the Mexican flags and other relatives with them.