Someone who identifies and punishes people for their opinions(noun)
WordNet. Princeton University. 2010.
Use "witch-hunter" in a sentence
"I'm no witch-hunter, and I can believe that everyone scrambled to cover their own mistakes, as he says ... but it's sad to see evidence of such aloof attitudes toward human life."
"So this is one of those things where an evangelical church has somebody come visit and badmouth his homeland, like that witch-hunter who put a force-field around Sarah Palin?"
"Looking at the colonial-style hat, cloak and garments, Levi was reminded of the terror of Salem — Reverend Cotton Mather, scientist, theologian, and witch-hunter."