Drivers honk at each other all the time.
Drivers cut each other off.
Drivers roll down their windows and shout "learn how to drive, you moron!" at one another while making indecent hand gestures - even if they are the ones at fault.
Is driver behaviour towards cyclists really worse than their behaviour towards other drivers? And if not, should we just take it in stride, rather than taking it personally? One could make that argument.
Of course, the big difference between intimidating other drivers and intimidating cyclists, is that cyclists are considerably more vulnerable - something I am highly aware of when a driver plays "chicken" with me while turning left at full speed as I am trying to go straight through an intersection, on a green light. Bike lanes and protected bike paths do little if anything to solve this problem if there are no cyclist-specific lights at intersections. It is difficult to take things in stride when the competition is stacked against me both in terms of speed and in terms of safety. But I try to remember not to take it personally.