Did the 2nd amendment save Mark Pretti from that exact situation happening to him?
If a populace gives up their weapons they become ultimately powerless against armed aggressors. 2A first purpose is to make citizens the first line of defense against invasion. This is supposed to be in place of a standing army from a time that a town could be wiped off the map by invading forces before any military force could be dispatched.
Yes, a permanent standing army is unconstitutional (Article 1 Section 8).
The fact that ICE are still parading around on the street has put in a nail in the coffin that 2A is absolutely pointless.
If anything, USA citizens deserve to have their guns taken away forcibly just because they could use them but didn't.