to be an owner of a car like that, you need to 1. not care about it, and 2. have a sense of humour.
maybe he has a dry sense of humour. Maybe he put it there to frustrate those who have nothing better to do with their time than to contemplate the insignificant matter of why a person would place a little logo on a car from a different manufacturer.
I dont hear people complaining when someone fits Porsche brakes to their car.
This guy has balls, doesn't care what people think, has a sense of humour and gotten all your knickers in a knot. I think he's a champ.