When I was young I had violent thoughts as well. But I didn't judge them because for some reason, in my younger days I did not self judge, all that stuff came later for me. The people in my thoughts actually all wronged me in some way. They pushed buttons and treated on sore toes. So I actually understand why I thought what I did. These days, when I feel like that, my thoughts are less violent, I'm not the perpetrator in my thoughts, just sort of semi involuntarily daydreaming about nasty things happening to them...

Maybe I'm not a warm and cuddly person, but then it just is like that. I'm not sure if the people you have thoughts about wronged you, but if they did, you might need to talk to someone who is compassionate and can validate your feelings. All victims don't react softly and humble with tears. Some have other types of reactions. They should not be judged but understood. IMO at least.