Why Can't We Be Friends? Three men who act more like clique-y teenage girls

"You've got a short memory," Tub said.
"What?" Frank said. He had been staring off.
"I used to stick up for you."
"You shouldn't have just left me back there like that." Tub and Frank Pg. 191
All this gossiping and hurtful teasing sounds more like it should be coming from a group of teenage girls. Instead it's coming from three grown men who can't seem to all just get along. The only difference between teenage girls and these guys is that somebody ended up shot in this story. Only Men. Instead of these men trying to all make peace with one another they just switch sides and insult the other. At the beginning Frank is completely on Kenny's side. He is constantly throwing fat jokes at Tub and never sticks up for him. This angers Tub because apparently Tub used to stick up for Frank. Then Kenny begins to throw the babysitter card in Frank's face which doesn't make him happy. When Kenny is shot and can no longer be in control of the pack Frank switches sides completely and decides he really likes Tub. They have an adorable bonding moment in which one admits to a love affair with a sixteen year old girl and the other gorges himself on four plates of pancakes. This is all happening while their other "friend" is lying in the back of the truck bleeding to death. Obviously this is far from a healthy friendship. The worst part is they could have avoided this whole mess if they had simply gotten along with each other. But because they chose to act like snotty teenage girls they now have an illegal affair, a serious eating problem, and a possible death on their hands. If only they would just grow up.