Question

write protest against in idiom Or proverb form​

Answer 1

Answer:

Protests have been made/registered by many people who would be affected by the proposed changes.

A formal protest was made by the German team about their disqualification from the relay final.

Conservation groups have united in protest against the planned new road.

Answer 2

Answer:

take up arms against, test the waters , turn the tables · up in arms · grain of salt · make a mountain out of a molehill · pain in the neck.