The action taken against the spokespersons who insulted the Prophet may have __________ tempers in the short term, but social media warriors will not let it pass.
From the sentence, we can identify that even though the action against those people has soothed the temper, the social media will actively take upon the case. Hence, calmed/pacified is the correct word here. The action taken against the spokespersons who insulted the Prophet may have calmed/pacified tempers in the short term, but social media warriors will not let it pass.
