In Germany every asshole drives an BMW, but not every BMW driver is an asshole. It's a German brand so they much cheaper than in America because there are no import costs. Yes, they still are substantially more expensive than a VW but there are much more a car every other German drives than something special. If we only talk about the higher end models - sure.
In the UK, BMW drivers were notorious for being the most aggressive and least polite on the roads of the 80s and 90s. In recent years Audi have stolen that crown, thanks to slick marketing and product placement. This brand attracts superficial and insecure cretins like a magnet and the ecosystem is rife with fraudulent behaviour. The used car market is a minefield of manipulated odometers and stolen vehicles.
I got upgraded from my usual generic Mercedes C-Class rental car to a BMW 5-Series on one of my trips to Germany. I instantly felt 10% more assholish as soon as I got into it. I even managed to get a speeding ticket within the first 10km or so - camera caught me going 8km/h over the limit in a construction zone, I think on the A67. The fine was only something like €20.
I usually make a conscious effort to not drive like an asshole, especially when I'm traveling, although for some countires driving like an asshole is mandatory.