Zephaniah 2:11 The Lord will be awesome to them, for He will reduce to nothing all the gods of the earth; people shall worship Him, each from his place, indeed all the shores of the nations.
Following the verses contextually, “them,” would refer to Ammon and Moab, who we have been learning about since verse 8. God will be awesome to them, in the sense that He will render all opposing deific contenders moot. Molech, Chemosh, et al., will be revealed as imposters and demonic fronts to mislead the nations.