--you can imagine what comments this brings from the left---
The issue here is that the undocumented people can't buy firearms, yet I don't hear the liberals talking about any violation of the Second Amendment. That suits the liberal passion for safety over freedom; liberals tend to say "if you remove all guns, you will remove all gun violence." (Let's not get into the question about disarming law enforcement, even though police have been killing people of color for some time now, in larger number than they have been killing white people.)
Disarm the citizenry, that's fine, even though the criminal element will always find a source for firearms. Disenfranchise the non-citizens (dead, illegal, felon, serial voters) is a whole 'nuther issue.