Your own articles state that even the most learned Jews have argued about its meaning, or whether it should even be kept.
Of course those articles also call gentiles who ask such questions anti-semites, while the Jews asking the same thing are simply "curious" or "students of Judaism." But that's how it always is. Except that with Kol Nidrei, the apparent effects seem to touch the Gentiles, so there's a functional problem with limited jurisdictional claims. And it's hard to research since, AFAIK, the Talmud isn't even available in English.
Have a nice day.