The guy was resisting arrest.
Watch the video. At most, he was passively resisting arrest. Does not justify the use of a chokehold (which, again, is specifically prohibited by the NYPD).
Yea, but you're still not allowed to shoot, taser, baton, hit or grab a suspect... even if he's trying to kill you. The only acceptable response is to try and calm the suspect down by handing him a cute, cuddly kitten.
tasers? Although those can kill a guy that ginormous too.