Those comments seem right inline with everything else "offensive" he's ever said. He says that people need to be shot or maimed quite often on Top Gear or his columns, so that's not really out of the ordinary for him. The Hitler thing is a bit odd in this context, but it's not something I'd get all upset about.
I agree with you guys, that would kick ass to see Jeremy driving a bus route
If it goes anything like his radio traffic control stuff, there'll be massive amounts of chaos 8)