There's lots and lots written about cults and cult leaders, which is worth reading, such as Combatting Cult Mind Control by Steven Hassan, or if you prefer a more traditional take, "Thought Reform and the Psychology of Totalism" by Robert Jay Lifton. Or any of other dozens of good authoritative takes on the subject by people who have spent their careers formally studying such phenomena, which can draw lines between all kinds of different groups and political movements that actually have lots in common.

What's wrong with this blog post is that the author does not seem to have read any books at all on the subject, which IMO is fairly irresponsible considering how much there is to read about it and how critical it is that "cult behavior" is widely understood in order for society to progress. Seems to be off the cuff musings about the topic, alarmingly even considering that some "cult leaders" are "good" (no) or that they can be "reformed" (irrelevant, but also REALLY doubtful considering what it means to be a cult leader; cult leaders generally remain such leaders well after they've been sentenced to prison for decades, their followers show up to visit, etc., there is no "reform" here, sorry), and overall a lot of muddy, uninformed and made-up thinking that will only get more people into cults.