Maybe if they had surrounded Waco and begin an assault, but we will never know for sure. What we do know is they confined Boston to their homes and went door to door hunting for those two kids after they set off their bomb, no one complained, as I recall.
The point is they will never make such an attack on a major city, they won't have to, they will slowly paint their targets as worse than the plague and your neighbors will help them.
Every action TV show refuses to have Muslim terrorists, they must be white militia that needs subdued. The old TV show 24 started with Muslim terrorists but next season they had to have white traitors attacking the US. Propaganda works.
You must live behind enemy lines to have such neighbors. It's exactly the opposite where I live. In fact, in my region of the country, folks would be more likely to paint targets on the homes of liberals and other pro-tyranny types.
Bottom line - I think you're buying into an apocalyptic vision that will never come to pass. At least not in this country. Americans are simply not going to roll over and succumb to government confiscation of arms like you think they will. Not by a long shot.