Well my paps when I was younger a long time ago owned a really tuned 323i bimmer

He is a very good driver, he used to race yes, but he would most likely bad mouth people who drive carelessly in traffic especially in say a city. He just used his best rationale if you will I dunno its just hard to explain.
The only reason he tuned the car was because he wanted to feel like he had a low budget ferrari

(His dream car has been always a lotus esprit). He'd race his buddies who had also tuned cars but they'd do it on the highway (which were curvy too) but this was when we lived in Libya, North Africa. The roads are better then the German autobahn (glass race tracks lol, built by the Germans at higher quality -- due to weather conditions). Plus there were times when there was no one on the road for various reasons so it was almost all to themselves. Plus when coming back from work (there were different work times) they got their chance heh.
Hmm the only people I've witnessed drive like total idiots in bimmers were younger people (I am very young so no stereotyping lol). I don't see many so.. I dunno. Most people around here are old guys who drive bimmers anyway haha...
Most guys who drive wrecklessly or who build up an attitude seem to be honda drivers (no offense to the honda community this could very well be just my city/area). Two friends became anti-friends once they got their hondas lol.. they were .. well don't wana bad mouth them, but their attitude changed I felt a bit disapointed in some ways :/ Ah well.. I think it's just coincidences.. the car someone drives doesn't necessarily define their assholery heh. It's one's goal when they drive and character they build or something like that...
What I see generally now around in my environment here in Canada where I am is.. basically this.. Every stop light everyone looks each other and pumps full throttle and boom fly off. LoL ok not everyone.. but its like a daily thing. Yes, I'm not denying my paps does that still but.. it's just different :/ Everyone's really agressive the goal is to show off in the majorest way and I think as young'uns the testesterone level is real high and that's what happens and where you get the idiots. Hell I admit it I would probably be a slight idiot at least a bit with my buddies but.. then somehow wouldn't I dunno..
So again it's not really a car thing.. it's just who's behind the wheel. The character and motive is what determines the driving. Are you driving to get from point a to b.. maybe to c as well and then backwards lol.. or are you driving to show off. Ah well I mumble too much