I see commonality here on several subjects – do we look at a treif object (feminism/socialism/zionism) and see the worst manifestation of it, or do we try to see possible positive elements that might be motivating some of the adherents. This is nothing new – avoda zara started as an attempt to show respect to Hashem’s messengers; some religions started/ or became popular as misguided version of Jewish religion…
I think the hiluk is in timing: when Inquisition was chasing us it was not the time to ponder their Jewish roots; when commies were sending Yidden to gulag and closing schools it was not the time to discuss with them the betterment of the world … But, as I understand Lubavicher Rebbe quoted here, one can look at person’s motivations and try to find and strengthen the right things. As one (non-L, yeshivish) Rav told me, he was sometimes asked by non-religious people whether he is a “Zionist”. He did not want to sully the good part of it, so he responds: yes, as in “hamehazir shhinaso l’tzion”.