If we let society keep a list of facts that may not be questioned, it will inevitably have crap like "the sun orbits the earth" and "a god named zeus created the universe" that need to be questioned.
When you declare an answer to be wrong and suppress it, the only difference is whether you go on to murder/imprison/exile the heretic or merely silence them.
I think the difference between murdering someone and not putting their website at the top of a search result page is pretty significant. That the Holocaust happened is a fact. Giving correct responses to factual queries should not be a controversial goal.
When I type 5 + 6 into Google search, are people being oppressed when the top result is 11? Would this be similar to murdering ideological opponents if my page declaring the answer to be 13 wasn't at or near the top of the results?