Over time, certain beliefs have become so popular that they become part of the cultural norm — unfortunately, though, not all beliefs are healthy and good. So when Reddit user PhenomenalPancake asked: "What toxic belief is far too common?" a ton of people gave their honest opinions on the matter. Here's what they said below. 1."Justifying bad behavior because someone did the same to you. Someone else acting poorly is not an excuse for you to act poorly." 2."That family has to tolerate each other no matter how reprehensible their behavior is. 3."That you can just will yourself out of...