Yes that may be true but there were some mitigating circumstances that caused the Polish dude to die, I forget what it was, heart condition or drugs of some form.
This situation was a little bit of both of their faults, the cop was being kind of a dick initially but I think he did well at the end explaining why to the wife and staying calm. The guy turned around to leave, had his hand in his pocket and looked like he was going, he didnt respond to instructions. The cop could have beat him down instead, would he prefer that I wonder.
Tasers save lives, I think that its good that cops have them, i would rather take 20 seconds of pain then get beat down by 4 dudes for resisting. Yes tasers are less lethal weapons and should be only used in dangerous situations, not as a punishment, but they are still safer than physical force, rubber bullets etc.