I was thinking of their profound and bitter anti-Catholicism which spread far beyond Massachusetts Bay.
. . . . not to mention the mainline Anglican anti-Catholicism which was nourished right through Victorian times by such otherwise admirable men as Charles Kingsley. . . . his public and disgraceful correspondence with Cardinal Newman makes the Puritans look like models of charm and decorum by comparison . . . .
. . . . I can only conclude that there was a lot of it going round, and we can't blame it all on the Puritans! They hated Anglicans, too, after all!