TBH, I wouldn't even say Jesus was a faker cultist. Maybe he was, maybe he wasn't. Maybe he never even existed. The problem is that all the information chain to him seems to go through Paul, who is very much opaque. He insists that he isn't transmitting anything he got from any man. He's only talking about the Jesus in his visions. Not even from the other apostles, not even after he actually physically lived in Peter's house for a while. He still says that nah, he didn't learn anything new.
And really, Paul is very much opaque. He sends dozens of letters (we know there are more than those in the bible) literally two dozen pages long each, obsessing about Jesus, and yet he feels absolutely no need to transmit anything about Jesus. Well, with one exception: the last supper. But anything else, he doesn't give a flip to tell the parishioners anything that mortal Jesus actually said or did.
Even when according to the later gospels (assuming for a moment they're not just fiction, which they probably are), Jesus had already said "do X" or "don't do Y" or gave a parable to that effect, Paul doesn't even mention it. He gives his own convoluted reasoning on the topic, or does weak-sauce fallacies for why you should do X or not do Y. You know, instead of going "dude, it's not just my brain-fart, Jesus himself ordered that."
He has the perfect appeal to authority there, but nope, he never uses it.
And we have the problem that even in his own account, there seem to be significant differences between what he understood from it and what the other apostles understood from it. Like, he seems to be the only one who thinks there even should be a ministry to the gentiles. So did Jesus actually say anything to that effect? James and Peter seem to never have heard of it. Or Paul is the only one who seems to think the rules in the OT no longer applies, while Peter seems to think he still shouldn't eat what the OT forbids. So did Jesus actually say it no longer applies? Peter never heard of that. Nor did James in Acts. In fact, given that those restrictions would only stop when the messianic age has begun, did Peter or James even actually think that was the case?
And even relying on the gospels, as I was saying in other threads, at most 30% of anything they put into Jesus's mouth can be reasonably said by the same person with a coherent world view. He's a composite of the opinions of at least 4 different people. (Hmmm... 4 gospel authors, and they give Jesus the opinions of 4 different people... I wonder if there is any connection there...

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We don't really know WTH Jesus actually said, and if he actually was adding much of his own to the law.
Anyway, TL;DR: I think it's more accurate to say that Paul was the weird cultist. (And as I keep saying, quite probably schizophrenic too.)