Maybe he was but I was also wondering about what the combination of psychological and physical abuse from others plus his own self inflicted abuse had on the healthy functioning of his brain.
Like we said in the show, it seems most likely that without all the social and childhood influences he still would have been a garden variety schizoid or psychopath. However, it was the abuse and so forth that turned his otherwise still pathological mind into something far more violent and perverse.
There was also something else about Ramirez. From what I've read about psychopaths they often try to gain the trust of their victims by using charm or pity pleas.
Well, that depends on the victims and what the psychopath wants from them. Ramirez could be charming when he wanted to be (just watch him smile at the ladies in the audience of his trial), but his violent fantasies apparently didn't involve coercion that would have required charm and so he never used it.
Ramirez didn't try to gain anybody's trust, he was all about instilling fear. I think he loved how much fear his actions caused in the wider community. And his interest in Satanism and drawing pentagrams at the scene of his crimes was, it seems to me, just another tool to create and perpetuate the fear and anxiety in the wider community. He never tried to hide the fact that he was a particularly obnoxious type, he even smelled repulsive.
This is where his paraphilia comes to the fore. He literally got off on the fear, the offensiveness, etc. This is why he never tried to hide who he really was during his crimes. Why he never seemed to care about his body odor on the one hand and specifically chose to wear all black and get the pentagram tattoo on the other. It was all meant to as you say instill fear, discomfort, etc. and all with the aim of feeding his sexual fetish.
I wonder if demonic possession had a role to play in Ramirez' murder, rape and child molestation frenzy? Like the type Laura encountered during her worst exorcisms. Is this what the panel were alluding to when you were recalling the L.A. Detective's interview with Ramirez and he felt the guy was acting very strangely and thought he was about to levitate? You said, "Maybe there was something else". Certainly Ramirez' use of LSD could well have invited that kind of attachment.
Perhaps. As we speculated in the show, there were a number of strange coincidences that point to hyperdimensional involvement. The question is in what way and to what extent. Personally, I don't think he was full on possessed. However, I do think there were some particularly nasty entities that had their hooks in him or had a feeding tube link up to him.
Whatever the cause of Ramirez' heinous actions he sure was one of the most evil humans ever.