dick ninny
An utterly foolish and obnoxious person who is so incurably self-righteous in his/her beliefs that he/she will go to any extent to defend them irrespective of whether they are right or grossly wrong.
Look at the dick ninny vegans attacking the BBQ shack.
Cotton Headed Ninny Dick
Taken from the christmas movie 'Elf'. A 'Cotton Headed Ninny Muggins was one of the lowest forms of insult, it's meant to cause offence. A term adapted to 21st century language.
"God, she's such a COTTON HEADED NINNY DICK"