“Regardless of its intrinsic merits, Rabbi Silverberg has the absolute right to question Rav Belsky.”
– No one has disagreed with this. He does not have to agree, and is certainly allowed to speak to and question Rav Belsky, shlita in private (respectfully), or defend his points of view in public (respectfully).
Also, the concept of “infallibility” is (lfi aniyas dati) not ours. There are, lehavdil, other religions that believe in the perfection of particular men or avoida zoroh, but we believe only H-shem is infallible. The closest one can come are those who are mentioned in Shabbos 55a and 55b as having led lives without a single avaira.
Gut Voch.