I'm telling you in advance that my answer will most likely upset you. You wanted the truth I'm sure, so here it goes...it's only my opinion.
It's more than weird...if you get these feelings... You have serious issues. When you have thoughts of killing other human beings it's a sign of mental illness. By writing your thoughts down its a way for you to read them over and over and play the scenario out in your mind for satisfaction. It's time for you to seek professional help before you find yourself behind bars for life.