Americans have the right to carry a pistol. But carrying a pistol while heckling police officers and touching a police officer who is performing their duty, sounds deadly to me.
Can we agree that the deceased had a right to carry a pistol? Can we agree that the deceased had been heckling police officers? Can we agree that the deceased had touched a police officer?
Nothing he did warranted death. But he did choose to put himself in an extremely dangerous position, moreso by touching a police officer than by carrying a pistol. But in any case don't carry a pistol when you are out looking for confrontation, especially with police. Even if you're right, you're still dead.