C. F. Keil and Franz Delitzsch on Proverbs 29:8

Pro 29:8 8 Men of derision set the city in an uproar,    But wise men allay anger.

Isa. 28 shows what we are to understand by אנשׁי לצון: men to whom nothing is holy, and who despise all authority. The Hiphil יפיחוּ does not signify irretiunt, from פּחח (Venet. παγιδιοῦσι, after Kimchi, Aben Ezra, and others), but sufflant, from פוח (Rashi: ילהיבו): they stir up or excite the city, i.e., its inhabitants, so that they begin to burn as with flames, i.e., by the dissolution of the bonds of mutual respect and of piety, by the letting loose of passion, they disturb the peace and excite the classes of the community and individuals against each other; but the wise bring it about that the breathings of anger that has broken forth, or is in the act of breaking forth, are allayed. The anger is not that of God, as it is rendered by Jerome and Luther, and as יפיחו freely translated might mean. The Aram. err in regard to יפיחו in passages such as Pro 6:19.