Faulty formulation: Historical disagreements among the Companions make ridicule and insult of some of them acceptable.
Correct formulation: Love, respectful mention and recognition of the Companions' standing are integral to the creed being studied. Historical events are not a license for abuse, contempt or sweeping denigration.
Application: Attempting to understand a historical dispute academically is not the same as mocking a Companion. Learning and restraint can coexist; due respect does not prevent careful understanding.