I love that apple is one of the only companies that inspire palatable hatred more for how their fans act and not the quality of their merchandise. It would be an interesting experiment if you gave a diehard apple hater the option of being given a fully loaded to the gills top of the line macbook pro with the caveat that they had to use it as their primary laptop and for not less than 50% of their total computing time for let's say six months. You could run similar test with linux and windows.
I suspect that familiarity would breed appreciation, not contempt. I used to hate Windows when I worked primarily with Macs, but not it's my preferred OS. Didn't have an opinion about Unix/Linux until I used it, and I love (no-GUI) Unix.
That only leaves me with about 248 flavors of Linux to 'hate'. And AS400 users, they're all bastards!