I quite like him and I didn't take his rant that seriously. He was mainly complaining about red light jumpers and pavement cyclists. It's long been said on here that such cyclists give everyone a bad name and guess what, they do.
I found his rant quite amusing I'm afraid and I rather think you're all being a bit precious.
<puts tin hat on>
Maybe, but just look at the comments on any newspaper......
The trouble is that there are a significant minority of drivers who think like this and the actions of "Celebs" such as Knowles / Clarkson et al reinforce this attitude which is unhelpful.
The other question is whether it is an appropriate platform.... if it is a DIY programme, then using it as a platform to vent your own personal issues is unprofessional and an unacceptable abuse or the BBC's public service remit.