the Ritva was merely quoting the Yerushalmi
… and saying how correct it is
Second, it is very odd that you consider the Yerushalmi more reliable than Bavli. It is a known … (cut out blah)
To repeat, the Yerushalmi agageta regarding Chrsitainity wasn’t censored as the Bavli was.
He invoked Yeshu ben Pandira, because that was how they already referred to him.
Your conjectures are cute, but if I was to imagine everything in the Gmeorah is paraphrasing mistakes then working out contradictory agagetas would be much simpler.