If it reaches that point, I don't think we're going to be worrying about what the current government considers "legal" or not.
At any rate, the right to bear arms is associated with the concept of defending yourself from tyranny. According to some interpretations that's part of the intent of the right to bear arms, part of what it facilitates.
http://en.wikipedia.org/wiki/Second_Amendment_to_the_United_...
http://en.wikipedia.org/wiki/New_Hampshire_Constitution#Arti...
Is it too late to fight for the rights of the average Joe / Jane who might be white / European (i.e. "real American" in the eyes of the mainstream)?
It's all correlated, you can't advocate torture, bombings, drones, wiretapping, deportations for being here illegally (say, Latinos or Asians who who moved here a little after the Anglo-Saxons got done killing almost all the original Americans) for certain groups and then demand justice for some others.
There are repercussions for the State violating it's bounds; if and when the will of the People decides there will be.