Neturei Karta has been condemned by every major Jewish group, including all Hasidic groups. Even other Hasidic groups critical of Zionism like Satmar signed a letter excommunicating Neturei Karta from their synagogues, calling them "evil" and sinners.
Their presence at Raisi's funeral is being trotted out as "proof" that Iran isn't antisemitic. (Some of the news articles think that these are part of Iran's Jewish community.)
I'm reminded again of the Verband Nationaldeutscher Juden and its leader Max Naumann in 1935.