Having no family through choice, and that means everyone - I can tell you first hand what hate is. (From me).
Hate is dangerous. Hate is powerful and all consuming. It can eat you. Twist you. Change your view on life and on people. It can make you feel the darkest emotions one can.
But, if and when you have love and pure love. Then it balances the hate and the hate no longer makes you sour and wretched. Seething.
Instead it fills you with pity. You pity the ones you hate when you're in love and have love. You pity them because you have compassion from love, regardless of who they are or what they've done.
Hate is a very powerful thing and if not careful, it can change you for the rest of your life.