The discussion is dead anyway now, so sure. To make this fun for you, I've written two lists and mixed them together. I'll let you sort out the sometimes justified from the broadly unjustified . I believe cyclists are hated for the following reasons:
Cyclists are physically fit.
Cyclists like to run redlights.
Cyclists are too poor to own cars.
Cyclists are yuppies with expensive toys.
Cyclists are drunks who lost their license.
Cyclists use the road for leisure, holding up people trying to work.
Cyclists ride on roads which are for cars.
Cyclists ride on sidewalks which are for pedestrians.
Cyclists lobby for bike lanes.
Cyclists moralize at gas burners.
Cyclists look dumb in spandex.
Cyclists act like they never do anything wrong.
Reasons I don't believe belong in that list (I don't believe anybody really thinks these):
Cyclists are too loud.
Cyclists are bad because bicycles have two wheels.