I used to hate some individuals for things they did to those I care/cared for or to me (my father, for example, or those that inflicted violence on me and I had to respond in kind), and those I'd consider "wicked" (those that have done terrible things), but I lost that. Some things are irredeemable, but I still don't hate those that do such. They're humans all the same. They have/had family, mothers, fathers, siblings, friends, partners and/or kids, and there's something that was good about them that allowed for this; even if 90% of someone is evil, there's still 10% that isn't. A snake will always be a snake, so you just avoid the snake if it bothers you, and if it attacks you unprovoked, you defend yourself or flee. You don't condone or approve of the "evil" if you don't hate it, but you don't have to put up with it; there's the difference.
When you end up hating them, you end up hating yourself, and the harder you confront those you hate, the hate for yourself rises equally. You might not even cognitively know you hate yourself, but those physical symptoms you experience from the hate, is your body hating itself. Even if they force it upon you and it's not your fault, the outcome is not any different.
It's the only way to find peace in life I've found. But, I'm just one individual and one experience, so results may vary.
(Well, this is what I ideally would like of myself. I'm like this most times, and it's taken several years, a lot of introspection/self-reflection, and a lot of talking to doctors/nurses/psychologists/psychiatrists/therapists to get here.)
As for the majority of people who're "good", they're just trying to get by in life as best they can all the same like any of us. They may say things we don't like. They may do things we don't like. But, hating them for these things means we may as well also hate ourselves as we're all different, and we'll say and do things they don't like either.