The Cars Universe is so messed up, you just have to put a few seconds of thought into it to realize it.

Also in Cars 2 is a Popemobile, which means Christianity is a thing, and therefore, there was a Car Jesus who was crucified.

In the spin-off movie Planes, Skipper is a WWII fighter plane, and we even see one of his war flashbacks. This means WWII happened, and there was a car Hitler.

In the beginning of Cars 2, we see that a spy car was executed by being crushed into a cube.

And to top it all off, Mayer lives in a junkyard full of discarded car parts, which might as well be discarded organs and body parts