a demagogue
Examples
A demagogue is a person with whom we disagree as to which gang should mismanage the country.
Better a loving single parent family than a 'conventional' family wherein the parents hate each other and the father is a demagogue.
Freedom is a demagogue.
One may become a demagogue out of sheer political innocence.
I'm not a demagogue.” "That's too bad. That leaves the field to people who are demagogues-to the Jarrets of the world. And there have always been Jarrets. Probably there always will be.