Problem is bunch of these protestors are probably anchor babies, so they will claim they have U.S. citizenship.
Which is yet another travesty as the 14th Amendment should not be used to grant citizenship to children born here of foreigner's who are here unlawfully. The original intent has been clearly bastardized.
If they show more allegiance to another country, they forfeit their anchor-baby citizenship (anchor-baby citizenship is a relatively recent phenomenon (within the last 75 years or so), and was never recognized until progressives started taking over the courts.