“Is Zionism more important to you than True Torah Judaism?”
Modern Orthodox Religious Zionism is the True Torah Judaism that has been practiced for millenia. Charedi isolationism is a relatively recent phenomenon, just a few hundred years old (and in its extreme forms, rejecting all secular education, only a generation old). And we have been praying for a return to Zion for almost two millenia.
Besides, there is a practical matter: Without the State of Israel, millions of Jews would have nowhere to go. Disappear Medinat Yisrael and we will have another Shoah thanks to the Arab and Iranian rashaim. And you are allying yourself with them.