This was not tribalism. The vote was on a knife’s edge, and only after many years of anti-European sentiment stirred up by conservative and other Euro-skeptic sections of the media. We can squarely blame Rupert Murdoch for this, even if he did not directly pull the strings. People routinely vote against their best interests because they are convinced to do so by a pervasive, aggressive, psychologically damaging mass media, which is now exacerbated by social media.