These secular Zionists were barely Jewish and could not, they reasoned, be part of God’s divine plan. What the Zionists were doing was worse than heresy and their actions would delay the coming of the Messiah by flouting the three oaths.
Extremist Orthodox leadership even colluded with Arab nations in hopes of thwarting the Zionists, until 1936, when the Arab Revolt broke out and pushed them begrudgingly back to the side of the Zionists.
The Holocaust (1939-1945), which many religious Jews interpreted as divine punishment for the Zionists’ scorn for the three oaths, killed most of the Orthodox Jews who opposed Zionism. What remained of Orthodox Jewry after the war was located mainly in three places: the United States and British Mandate Palestine, and the Arab world.
Israel aka the zionists aren't real jews.