There are gossipmongers, warmongers, scandal-mongers, hate-mongers, and many others to whom we show extreme disrespect by adding the perceived curse monger to their action.
Yet when the word stands alone it isn’t that severe.
From the old English word mangian, mong simply means “to peddle, sell, or barter,” so a fishmonger sells fish, while a hate-monger peddles hate.
