“a sefer that is only 98% kosher. “
98% kosher is 0% kosher. Either Rav Kook was an Orthodox rabbi or he was not. Either his followers are Orthodox or they are not.
Enough of this bashing of hashkafot that disagree slightly with out own! Enough of dividing the Torah world!!!
And give credit to those who helped to create the favorable environment for Torah in Eretz Yisrael. Rav Kook was the single person most able to bridge the gap between observant and non-observant Jews there, and to make the large non-observant majority look favorably on the Torah world. He was admired even by the gedolim with whom he disagreed.