”The third opinion (of Calvinism) is, that the Magistrate may and ought to exercise his coercive power, in suppressing and punishing Heretics and Sectaries, less or more, according as the nature and degree of the error, schism, obstinacy, and danger of seducing others, doth require. This as it was the judgment of the orthodox Ancients, (vide Optati opera, edit, Albaspin. pag. 204, 215.) so it is followed by our soundest Protestant Writers; most largely by Beza against Bellius and Monfortius, in a peculiar Treatise De Hareticis à Magistratu puniendis. And though Gerhard, Brochmand [de magist. polit. cap. 2. quæst. 3. dub 2.] and other Lutheran Writers, make a controversy where they need not, alleging that the Calvinists (so nicknamed) hold as the Papists do, that all Heretics without distinction are to be put to death: The truth is, they themselves say as much as either Calvin or Beza, or any other whom they take for adversaries in this Question, that is, that Heretics are to be punished by mulcts, imprisonments, banishments, and if they be gross idolaters or blasphemers, and seducers of others, then to be put to death. What is it else that Calvin teacheth, when he distinguisheth three kinds of errors: some to be tolerated with a spirit of meekness, and such as ought not to separate betwixt brethren: others not to be tolerated, but to be suppressed with a certain degree of severity: a third sort so abominable and pestiferous, that they are to be cut off by the highest punishments?”
~ George Gillespie
http://www.covenanter.org/GGillespie/wholesome_severity.html