Everything that people agree on cannot be real. Or to put it more bluntly, nothing that they agree on can be real. Since we can only know what is in our own minds, we are necessarily outside the reality that is beyond our minds. Therefore any beliefs or perceptions that we can share with other people just multiplies the misperception, which is why masses of people, and of course their leaders, behave uncommonly stupidly.
Our conception of reality is based on a panorama of perceptions and interpretations that originate within our thought-producing apparatus. For that reason, people tend to trust or give credence to commonly held beliefs as opposed to those that stand outside the norm. But these shared assumptions about reality are the first things we should discard if we are interested in truth.
Two wrongs do not make a right. If I am wrong and you are wrong, together we make a left. The composite of individual awarenesses projecting their illusions in concert constitutes a left turn from reality. Leave it all behind, for God's sake.