Is it normal that fear triggers aggression or even bloodlust in me?

As a child I began having nightmares that frightened me up to the point of triggering aggression or even bloodlust in me.I was turning from victim to threat for the one that threated me.I didn't really bothered with the idea that this could mean there's something wrong with me,so I ignored it.I was also kinda affraid to talk since I was an introvert and got bullied each time I opened my mouth to talk about anything.
Around the age of 16 I started to be agressive to the people/things that frightened me.
Today I have met an oldman (he's 80 or so) that scared me as a child since he always tried to flirt with me or even kiss me and get my attention.He even tried to convince me that I'll go crazy if I don't have sex with anyone and that I should have sex with him if I don't want to go in the mental asylum.He was clearly a pedophile so I always avoided him.He got into the same elevator as me (even though I took it because I knew it will get blocked between floors and hoped he won't come due to this).I knew what he wanted so I put both my hands behind my back in order to get out from "the compartiment" of my leather jacket a knife-like thing.He tried to mobilise me and kiss me,but I was faster and managed to put the knife thing at his neck and threaneted him that I'll slaughter him next time he tries such things on me.
That wasn't the first time when I got this aggressive in such situations I don't accept,but the point is that in the past 2 years I finally got to the point of feeling the bloodlust I used to feel in my nightmares.