Just basing this opinion on personal direct observation, people who hate cats generally a) have been taught to hate cats by small minded idiots and/or b) are emotionally somewhat retarded.
Hating an animal that is perfectly suited to its environment, that fulfills its place in the ecosystem, is a nearly perfect rodent hunter (far more suited to kill mice and rats than dogs) and that is capable of associating with humans despite the fact we have nearly opposite social structure is just plain ignorant. Choose not to associate with them if that is what works for you, but cats fill a vital role in our ecosystem. It is believed that the indiscriminate killing of cats caused more than a few plagues because rats and mice ran amok.