It isn't important what I would do or you would do in that circumstance. The Dallas County Historical Foundation made the decision to hire Gary Mack. I assume they went through the interview process with him, possibly multiple interviews. They probably interviewed others as well. After going through the process, they chose Gary Mack. I have no reason to second guess that decision. If they wanted to hire someone who was unbiased about the JFKA they would have severely limited the number of available candidates because most people would have an opinion on the JFKA. There is no reason a person with Gary Mack's POV could not do a good job as the curator of the museum. It was a management position and didn't require a person who was unbiased to do the job properly.
You're both funny and inconsistent. It, "isn't important what I would do..............", so you then Speculate as to what did happen? Just admit you do Not currently have the "foundation" to discuss Mack, and are too lazy to look into it. You have no idea as to the "claims" he made over the course of his "JFK Assassination" years.
You like to huff-n-puff, but in reality there is precious little to back up the bluster. "Foghorn Leghorn" comes to mind. Enjoy your day and watch out for Chicken Hawks.