Well, if I remember correctly I too am an INTJ. I also shared that "devil's advocate" part of your personality and the negative and sarcastic tone, though I've worked hard to tone things down so as to better be heard by others. I also find you to be one of my favorite posters, so welcome to the club.
I believe that the JWs foster such a personality, even the literature having an air of superiority and mocking tone. I also believe that it attracts people that naturally had that to begin with.
I'm really sorry about what happened to the collage you made. I felt a little gut punch just reading it. I'm also sorry for your loss.