Banning anti-Israel Voices Contradicts Hillel’s Own Mission

In one of my favorite stories in the Talmud, the disagreements of the schools of Hillel and Shammai are solved when a heavenly voice calls out, “These and those are the living words of God, but the law is as according to the school of Hillel.” The reason, we are told, is that the school of Hillel not only presented both points of view, but even taught the opposing view first.