I take it you've undertaken exhaustive research in this regard?
It's not my experience, thought there are a good few of them out there. Generally speaking, I've not encountered many arrogant arseholes on bikes as a motorist, or as a cyclist.
I complete a 12 mile daily commute on the bike (most days, and certainly whenever I can), and I also drive around 10,000K miles per years, so I reckon I'm qualified to hold this view. I can say that, in my experience, there are many, many more arrogant motorists, van drivers, bus drivers etc., but, even then, this is not a majority.
Cyclists who commonly use the same route (eg: commuters) become known to a lot of drivers, so courtesy can go a long way. I don't cycle through red lights, very seldon use the pavement (and only when there is little, safe alternative), and try to acknowledge when motorists are considerate towards me.
I rekindled my love of cycling a few months ago, having previously pretty much chucked it due to lack of opportunities to get properly off-road (family commitments etc.). The best option seemed to be to cycle to work. i now hate when I'm stuck with the car. I've lost a stone and a half, feel much fitter, and really enjoy clearing my head at either end of my working day. I'm not saying this to be smug, BTW, I would genuinely love it if more people could share the great things about getting in the saddle.
I serviced my Gary Fisher this week, and it's running like a dream