R. Yitzchak Adlerstein publicly supports R. Nosson Slifkin on Cross Currents:
This author has his name on every one of the banned books. I am as supportive of the thrust of those books as when I first wrote those approbations. I believe that the thrust of what he wrote is firmly in line with the teaching of Rav Hai Gaon, Rav Sherira Gaon, the Rambam and his son, Rav Shamshon Raphael Hirsch, and Rav Aryeh Kaplan. I am also proud to be in the company of many talmidei chachamim who did not sign the letter, and of more chaverim than I could count who think the same way. I am in the company of virtually all intellectually rigorous kiruv workers, who have been using this approach for decades. With them stand literally thousands of bnei Torah who happen to work or study in areas that raise issues about Torah and science, and for whom the above-mentioned figures have served as their lifeline to uncompromised avodas Hashem. There are reasons why they have not (as of yet) come forward publicly. Hamayvin, yavin.