It is too easy to label Korah evil and dismiss his claims. There is nothing in the pshat, the simple reading of the biblical text, to castigate Korah as the embodiment of evil. In fact, it is suspicious how ready everyone is to get rid of him. What are we covering up? What truth does Korah know?
The rule that American Jews don't have the right to speak out since they don't live in Israel and won't suffer the consequences of their ideas has visceral appeal but has proved, thankfully, unenforceable.
In 1470, five corpses were found in the charnel of a church in Endingen on the Rhine. Eight years earlier, a Jewish man named Elias had sheltered a family of five beggars in his home during the Passover/Easter season. Assuming that Endingen's Jews had murdered the family in order to use their blood for ritual purposes, the governor ordered that Elias and his brothers, Eberlin and Mercklin, be arrested and interrogated.