Heretic – A person who has an opinion that is opposite to or against the official or popular opinion or beliefs; especially religious ones

The heron ticked (heretic) everyone off for disagreeing with the popular opinions and beliefs.

Examples of heretic in a sentence

In medieval times, a woman may be deemed a heretic or even a witch due to her beliefs.

Kristina was called a heretic by her parents when she told them she wasn't a fan of their beliefs.

As an atheist Trevor didn't believe in god, but Susan was a heretic because she believed in her own god, not the Christian one.