Ha! I ride motorcycles and am a member of motorcycling forums. On one forum where the moderators let almost anything stand, they have had to shut down several bicycling threads on account of the mess they become. I'd say that the percentage of motorcyclists with negative attitudes toward bicyclists is about like it is across the general population.
I really don't get the pervasive anti-cycling mindset in our society. The level of outrage and indignation is way out of proportion to any inconvenience that cyclists pose.