Chabad is still in shita against Zionism
But to clarify a little there is two aspects to that changed after 1948
1 – as Jews we need to support any Jewish community in the world no matter where it is, including eretz Yisrael
2 – 1 – once the yidden have control of eretz Yisrael we have not right to give it away, and giving it away is against Halacha
As it is a gift to every Jew from hashem.
2 – giving away land will only cause more violence, and when an enemy comes and tries to fight even just to steal straw we are Obligated to fight them even on shabbos ( citation needed )
3 – right now the madina as a whole is not fully shomer Torah umitzvos, the best thing we can do is work to change that and make the whole country shomer Torah u mitzvos, with a big enfaces on education of the young children.
( a non expert opinion )