Movie plot explained in one news article

Hello. My name is John Wick. You killed my dog. Prepare to die.

in china
gangs of assholes on scooters using poison dart guns to kill dogs, collect the bodies, then sell them as meat
guy saw the dude shoot his dog on a security camera and went berserk
the dog-killer's family had the gall to say he was wrong to do it

Let's all sign the petition to get the driver an all expenses paid trip to the Dominican.

I'm sorry, but if you people see that I'm about to die on a scooter, you have my permission to kill me.

I'm not saying that it was right, only that I understand.