Jeffery Woolf of Bar Illan University has this to say about the Slifkin ban:
800 years ago, the kind of witch hunt this ban has generated led 'Frummer Yidn' to invite the Holy Office of the Inquisition to burn the writings of the heretic from Cairo. They did so in the center of Montpellier. That act of fanatical mesira provided the legal precedent for the burning of 24 cartloads of Talmudic Manuscripts in the Place de l'Hotel de Vosges in Paris in the Spring of 1242.
I suggest the 'gedolim' learn some history.
And then, this:
There is, in Jerusalem and New York, a group of highly sophisticated Ba'ale Teshuva who entered the Torah World because they had been shown that one can be educated and Torah observant as well. The vicious attacks on Rabbi Slifkin, which are themselves heretical as they contradict the words of literally dozens of Rishonim and later authorities, are creating an atmosphere which will drive these wonderful people from Torah.…What do we have to offer these fellow Orthodox Jews, when the Roshe Yeshiva they so admire deny them their place in the World to come?