About the Gate 13 one... I've heard many stories of why they hate cops so much. At least 3 people have died because of cops. Not directly though.
There was this episode somewhere, where 8 motorbikes with PAO fans were spotted by cops. Among them were 3 women. One of them was heavily injured in the head and was bleeding. The cops started chasing them because they thought they'd go loot some place and the result was the injured guy and his girlfriend who was riding the motorbike lose control and crash and eventually died... There's also another similar incident where one died but I'm not certain so I won't say anything...