There was a good Washington Monthly article a few weeks back that stated why SUV drivers are such assholes:
http://www.alternet.org/story.html?StoryID=14839.
SUV owners are frequently "nervous about their marriages and uncomfortable about parenthood. They often lack confidence in their driving skills. Above all, they are apt to be self-centered and self-absorbed, with little interest in their neighbors and communities. They are more restless, more sybaritic and less social than most Americans are."
Aside from the fact that the nations SUVs guzzle more oil than its aircraft carriers. "Me like oil," Gee-dubayah Bush once told me in private. Well we all know why we're going to war, but SUVs also kill a great many more passengers than they save. They crush other cars, and study after study proves they themselves have shockingly high fatal rollover rates and lethal side-impact dangers. And, given the horrible visibility from SUVs, their drivers have a rather unfortunate habit of running over their own children in the driveway. True. Research has proved that a tank like the two-ton Chevy Tahoe kills 122 people for every 1 million models on the road; by comparison, the Honda Accord kills only 21 per 1 million such vehicles.