A frequent topic is why American citizens might not be in favor of open borders in modern America. Perhaps one reason is incidents like this where students are punished for wearing American flags on their clothing to school and there are protests in support of the punishment.
The matter of concern here is not some small set of anti-American immigrants who nonetheless want to be citizens, but the support network and political climate that makes it possible and seemingly reasonable to act in such a manner. That’s the real difference between now and previous waves of immigration. This goes directly to the issue of how much immigration our nation can currently absorb without losing our national identity. I don’t find it unreasonable to see things like this and conclude that level is “not much”.