[Robert DeLong]

I doubt he hates cans (your word for cars?), but he certainly opposes those who work in detention centers, because he certainly is not a right-winger. He’s a died in the wool leftist. That was my point.

[Phil DiBasquette]

Ok it’s a reference to Navin Johnson

[jonascord]

There is an, apparently, old, movie, called "The Jerk", where a crazed sniper is shooting at Steve Martin, who is working as a gas station attendant. The sniper keeps hitting cans of oil, in a rack. Martin, playing a stupid Democrat, Navin, determines that the sniper hates the cans, hence the warning. It's a punchline.

You can, no doubt, find the clip on Youtube.