I guess its easier to hate, than to bear the pain of loving someone when they hurt you.
That is why God teaches us to forgive.
People are so egotistical and humans are so naturally emotional, it us sometimes hard to know how to do what's right.
As simple as it's sounds, do what Jesus says, and in the end, everything will work out All Right.
It's a promise.

And we know that all things work together for good to those who love God,
to those who are the called according to His purpose.
ROMANS 8:28