I've trained under guys some hate and others guys seem to love. I certainly don't mean this in a derogatory way, but only one trainer was able to teach me something different; I mean in applying what I've learned. The others seemed to just re-teach the same lessons and basic skills. But, that is okay with me. I don't expect a class to always "teach" me something, but use the opportunity to have another person evaluate and put his finger on what I can do differently to improve. All of my trainers have done this. Also, I don't go into a class expecting a former SEAL to make me into a SEAL. This seems to be what most people are after when talking about resumes.
Jackson has authored a few threads about what makes a good trainer, but the bottom line is, most people are not going to pay to receive information from someone they do not like or respect, regardless of their resume. The minority have the ability to overlook personality differences, if the experience or training will promote growth. I'm not sure what the future holds for Cory, but I certainly wish him the best.
Not respecting someone and having a "personality difference" are NOT the same thing.
Personality is the least of the reasons I don't trust/respect James Yeager or Cory Jackson.