It's like asking is it a sin to use a knife? The question is wrong. The question should be "HOW should we use a knife".
The question should not be is hate good or bad, but "what is hate good for"?
And it is good for certain things and bad for others. The Torah tells us how to use it.
can you tell us about it Lubab?
Hate is a tool. It can be used to fulfill a mitzvah (like hating evil can keep you from sin, wiping out Amalek). But you must control the hate. The hate shouldn't control you.
Then you'll know how to use the hate in the proper proportions when you see it as a tool this way.
Hate is like fire. Can be dangerous in the wrong hands.
Generally we are supposed to hate the evil within the person, not the person himself.
But by heretics the Torah actually says to hate the, with a consummate hatred as King David writes in Psalms "I hate them with a consumate hatred".