My cousin killed a bird right in front of me

He stopped on it with his foot. I was 19 when this happened. I cried for hours upon hours. I even cried myself to sleep. After that day my relationship with him changed, but after that night, I never cried to parents about it again. Later in my life during a fight they mentioned how I should have gotten over what my cousin did. He was 7 at the time. It hurt so bad. I care about life. To destroy life seems wrong to me. I've seen a lot of criminal minds episode, forensic files, etc. It's been 3 years since I witnessed me cousin torturing that bird and just yesterday I saw a Jeffery dohmer documentary. I've never connected any of my screwed up family members to what I've seen on tv. When I saw Jeffrey Dahmer ' s trials for the first time I experienced something I never had before. I saw my cousin. The same gaze, the same hazy glare. It's hard to explain. They looked one in the same. I'm scared for what he'll turn into. I really am. My family is crazy. I think it's genetic, they're all mental. My grandpa commited suicide. My uncle the same. My cousin crashed his car on meth and was in CCU for months. Many of my other family me energy have drug problems. I am severely depressed and it just hurts me that my parents scold me for being hurt by what my cousin did. Am I wrong? Please help. I feel so lost all the time. I feel like the only one with a heart