They really didn't have much choice in this incident.
In LA, if this guy were walking down the street like that, they send out a tactical swat team, seal off a 10 block perimeter, set up command posts, shoot the cell phone out of his hand, send in the dogs, tazed him, shot him several dozen times, and if he resisted, 7 or 8 would beat him senseless with clubs. He would then be arrested for failing to follow commands in a timely manner, in addition to 36 other law violations.
In LA they have reason to respond this way. I don’t like the fact that some cops do not like citizens carrying protection, but they are dealing with an armed unknown when they approach you. The gentleman in the video had a calm demeanor and explained what he was doing. The idiot in the striped shirt could have gotten someone shot.
If you want to educate cops about your rights, visit the local police station. Don’t beg for a confrontation on the streets. The same refrain the officers show to you could land them dead tomorrow.
Armed people should always be respectful and not let their friends dare the other armed person show restraint.
I used to live in the People's Police State of Kalifornia too. I left for New Hampshire for just this sort of reason.