Add fuel to the fire
Meaning
Make an already tense situation worse.
Usage
Used when someone inflames conflict or criticism.
Origin & History
Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.
Fire metaphor: fuel makes flames grow hotter.
Used in moral and political writing to describe escalations.