Why are some Camaro owners so obnoxious?

First of all I'm not bashing all camaro owners, I think it is a very nice car, being a Mustang owner. So last night I decided to take my girlfriend out to dinner, I wanted it to bs a classy dinner date. On the way there this red 2012/13/14 i don't know camaro starts reving behind me, then pulls up next to me keeps reving even though there were like 10 cars in front of both of us, he then follows me for another 5 minutes, eventually he starts speeding on the bike lane almost hits 2 cars, then drives off, he had the ugliest spoiler I've ever seen on a muscle car, nasty straight pipe exhaust, sounded like a stock engine too. Again I have respect for all American muscle, but it's not the first time a camaro annoys the hell outta me with a bunch of traffic around.

I've seen Mustang owners do the same.