Facebook shouldn't be attacking anyone's freedom of speech. People should always have the freedom to say whatever they like even if it is incorrect or offensive.

In regards to holocaust denial. Is this term reserved for those that completely deny the holocaust happening or are those questioning the reported number of deaths thrown into that group to?

Recorded history is rarely purely factual. The losers are nearly always villianised and the victors celebrated as heroes. The atrocities committed by the Nazis to Jews is always highlighted. Whereas other atrocities are downplayed.