The fact that yiddish was weaponized to negate the Judaism of non yiddish speakers is completely irrelevant, since once again, the language was built on torah, for the sake of torah jewry. You keep attacking the way it was used by bad people to do bad things. Yiddishists used yiddish the same way Zionists use hebrew – they wanted to make a Jewish language devoid of Torah.
Ben Yehudah wrote openly, along with all the “safrut” writers that their goal was to recreate a Jewish culture apart from religion. Zionism sought to create a new jew based on social constructs and the same nationalism that gave rise to Nazism.
“Doesn’t deserve an answer” – read “the empty wagon” for wagon loads of quotes from the progenitors of modern Hebrew. Their goal was to undermine torah.
Rabbi kook calling Yiddish a jargon (which is not really pejorative) ranks pretty low on the list of aberrations and issues that he had. The fact that he associated with murderers like ben gurion or other reshoim like ben yehuda was one of the bigger problems, precisely for the reason that it gives authenticity to such enemies of hashem.