Wow that was long!
You made a few assumptions about me that were not quite accurate but that's okay; I think I see where you're going with this.
In my teen years I was not at the same level of consciousness that I am now. Killing demons on the astral plane was empowering, and besides, they started it.
But seriously, they came and attacked me and I defended myself. After awhile I decided defending wasn't enough and actually went on the prowl some nights to proactively rid the world (or astral world) of the demons. I thought I was doing the right thing.
Now that I am older and, I hope wiser, I would not seek out a demon. I would simply vibrate at a frequency where we would never interact. I would not kill or banish a demon unless I felt I had no choice to protect someone I love. I treat demons like I treat spiders... if they come in my house and are a threat to my family, I will end their life. If they stay away from me and don't bother me, I will leave them alone.
Hitler was not evil, just terribly misguided. He thought he was doing the right thing. He was wrong. I am sure he is working on that. You probably admire his leadership. Nothing in your post suggests you want to go out and intentionally harm people so don't claim you're evil my friend.
Nothing wrong with forgiving a murderer. It's not really your place to forgive or not forgive, but if you feel you need to, go right ahead. That's your right.
What is it you really want to know?