Why does being on a bike in London cause so much conflict? (this time, a jaywalker)

You're advocating intimidating pedestrians to 'learn 'em'. I'm reminded of your attempt to browbeat people into accepting your views on religion. Why exactly do you want so badly to punish the rest of the world for not meeting your exacting standards?

Maybe he just wants to save us all from ourselves. After all, if someone was in the wrong wouldn't you feel it your duty to point it out and help them on the correct path?

Of course the problem is the subjectivity of the correct path according to your experience and beliefs. That's where all the trouble comes from.