So my reckless acting out when I feel very attacked (like smacking guys upside the head in my teens, or just overreacting to slights and becoming verbally defensive as an adult) could be Demonic Se? Just showing the ugly side of Se?
Yes, that would seem to match perfectly.
Well, okay. Also, I seem to identify with Si a whole bunch, which makes me think it was in my top four functions, and I fit the Lenore Thomson description for Inferior Si perfectly. It just seems that some ENFPs are unaware of their Si or if they are aware, reject it. I guess I'm just a more Sensor-ish NF. That doesn't bother me at all, maybe I'm just more balanced. On the four dichotomies I am most strongly FP rather than E or N.
The way I'm coming to understand it, as I have been saying elsewhere, is that our feelings of vulnerability and inferiority will come through the inferior function, and our reactive behaviors and projections will be through its shadow, the Demon (at least if the perceived threat is great enough).
So this is why most people will attribute everything inferior to the fourth function-attitude, but when they take the cognitive processes test, the inferior will often be 8th, and the 8th function will be strong.
It thus matches Lenore's ship order, where Se would be the right-brain alternative "Crow's Nest", which will appear to be the first line of defense when the dominant can't solve the problem.
So likely, you feel inferior in issues regarding stored factual/tangible data. Emergent conceptual data can't help you with that, so you then turn to emergent tangible reaction (rather than data), such as smacking guys on the head.
And didn't you mention a background of abuse, or something? That right there is going to make Si a very painful and touchy area for you. So that is why it will be more noticeable for you than other ENFP's. It will be even more irritable and easily bruised, also leading to easily constellated Demon Se. I'll be those guys you mention somehow triggered bad memories, or something, and thus you reacted like that.
To keep this on topic, let's now transfer this to Hitler, and picture an extremely messed up Fi complex (whether puer or anima) that degraded into a very bad Fe reactiveness.