"put the cat among the pigeons" is a #British idiom used to describe a disturbance caused by an undesirable person from the perspective of a group.
For example, l'm a genuine #climate leader (with very few supporters). I understand, do, & speak out for the climate solutions. And, l'm critical of the problem (people that don't support the solutions)
An undesirable (cat), from the perspective of the #FossilFuel & #WoodFuel apologists (pigeons)
It helps to know your own, human, #psychology