I honestly feel like such a mentality is at odds with the overall philosophy of the open source software RMS loves to extol. Community engagement drives such products, and a big part of this sort of communication is disagreement.
It's not exactly "freedom" if we're only free to listen to RMS. His response reeks of self-righteousness; that alone should be enough to disqualify him as the voice of the FSF.
I was hoping for a thoughtful response, but he would have been better off not saying anything.