This is true, I guess the difference in the Jim Jones scenario is whether you define effective leadership as being able to get your plan carried out (even if that plan is killing everyone you lead) or whether you define it as achieving good outcomes for those you lead.

Hitler didn't do either of those things in the end so I still don't rate him, but I can see why you would if you just look at the first part of his reign.

AI often produces unintended consequences based on its interpretations - there's a great TED talk on some of these - and I think with the LLMs we have way more variables in our inputs than we have time to define them. That will probably change as they get refined.