Answer:
Counter-Reformation, also called Catholic Reformation or Catholic Revival, in the history of Christianity, the Roman Catholic efforts directed in the 16th and early 17th centuries both against the Protestant Reformation and toward internal renewal. The Counter-Reformation took place during roughly the same period as the Protestant Reformation, actually (according to some sources) beginning shortly before Martin Luther’s act of nailing the Ninety-five Theses to the door of Castle Church in 1517.
Explanation:
(Jacobins group) The Jacobins killed people in an attempt to purge the public in France. They believed many people were a threat to the nation.
This is actually pretty common and the reason "why" is due to the idea of hysteria. Hysteria clouds judgement. There are so many examples of hysteria clouding societies judgement in society.