You forget other videos of people holding AR15s where it is clear (and quiet and polite) they will kill the badged looters if confiscation is attempted. They were left alone.
let’s see the videos...post a link
Even if they exist, The NRA won a court case with the city of New Orleans over illegal confiscation, which was widespread and systematic. The confiscation was done by the order of the chief of police.
To say that some people kept their firearms, therefore there was no confiscation is a logical fallacy.