Even though he knew a "Yeshivish loshon kodesh" of sorts (which is very different from the profane Strassen-Ivrit of the Israeli shuk), Libi Kahane relates of the great effort R.Kahane made in his 30s to master spoken rhetorical Hebrew, which he knew was absolutely was essential if he was to start a grass-roots from scratch political movement among Sefardic Jews.
With its tenses, binyanim, apocopatives, conjugations and genders, Hebrew is not at all easy to master for the thinking man who comes to it late. Hebrew is much more difficult than English, which is probably the easiest language to learn. Let alone getting the right accent. The Hebrew accent of most Anglos is painful. How the crook Flatto Sharon got in to the Knesset without knowing a word of Hebrew was a travesty!