火上加油

to pour oil on the fire (idiom); fig. to aggravate a situation; to enrage people and make matters worse

to add fuel to the flames

add firewood to put out the flames (idiom); fig. ill-advised action that only makes the problem worse; to add fuel to the fire

(idiom) to fan the flames; to incite people

lit. to carry firewood to put out a fire (idiom); fig. to make a problem worse by inappropriate action

to push the wave and add to the billows (idiom); to add momentum; to encourage sth to get bigger