Unfortunately for you the flavor of Zionism he endorsed (which preferred a binational rather than a Jewish state) hasn't had any political significance since Is

Unfortunately for you the flavor of Zionism he endorsed (which preferred a binational rather than a Jewish state) hasn't had any political significance since Israel's independence. If he were to espouse those same beliefs today, he would likely be seen as "anti-Zionist", if not outright antisemitic within Israel and its support base abroad. So no, one does not get to say "Einstein supported Zionism" per the latter's modern definition and context.