Not sure how anyone can find this funny. It's fucked up on both sides. I'm an animal lover and even though it's sad to admit this dog should be put down unfortunately. It's probably been trained/tried to be put into fighting or something and there likely isn't much hope to bring it back to being 'normal' or whatever. The guy's are trying to protect themselves as best they can I just can't laugh at this video at all.
Here reporting for duty. Pitbulls are aggressive but if raised in a normal loving household will pose no threat (or extremely little chance) like this unless it feels threatened. There is no reason to kill them off because shit people will find a new dog to abuse. Kill off the assholes who turn these dogs into this.