So what you're saying is you don't even have the ability to start to understand if what he's saying is true, as you've not been willing to put the effort into learning the math he's referencing - that you've never heard of - and instead essentially doing high-level ad hominem saying "he'd rather get the juice from claimed persecution than actually advance the field"?
Sounds to me like Eric is right about what he says about the field in general, and why there's been little to no uptake in the indoctrinated-seemingly ideological field of physics studies.
I agree his tactics may be lacking, and that clearly he'll have to do a better job eventually - to handhold for people who have the capability to understand but your comment here supports the difficulties Eric states he's encountered with academia.
Did you try sending him an email to ask him for more guidance? That would not only help you - whether that leads to believe he's just a charlatan or helps you learn new math - but it would be an opportunity for him to learn to be a better teacher too.
Arguably the most efficient path for Eric as well, since everyone has limited time and resources, is to work with people who actually show and put in an minimally adequate effort to understanding - where connecting with him directly is perhaps the first necessary barrier to breach, so that you can have a productive conversation and at least a chance to be on the same page; and if you don't even know the math he's referencing, and can't talk his lingo, then you'd have to begin to learn the language he's speaking as a prerequisite - especially before judging him - the irony here is your ad hominem is in fact an example of persecution - and from the physics' community's mouth itself.