I find telling the missus helps - she's heard it so many times that she totally doesn't give a t0ss and you end up thinking "oh, why did I bother". And just think - that blokes poor missus (better half / SO / etc etc) is probably listening to the same from him - and thinking "yes, yes, oh dear, move on, stop being a wally" - as are his work colleagues. :-)
But I know what you mean. It's the frustration of knowing that no amount of logic, reasoning or baseball bat will change his way of thinking.
Just look forward to going through the whole same thing with a different motorist on the way home... and tomorrow... and the next day...