I hate them
What is your reason for hating them?
I am not completely sure, but i just hate them.
It seems weird if you don't know why you hate someone. You should try to be loving instead of feeling hate for someone.
I'm planning an act of terrorism to give them a reason to be afraid.
You should not make any plan to commit an act of terrorism. You may end up killing innocent people, and you are going to end your own life whether it is jail or being killed.