I would argue the exact opposite: that the internet may have enabled the freedom of minorities to express their views without fear of repercussion or immediate ostracism, but that because of the nature of selection bias and the rise of echo chambers/safe spaces/whatever, the internet has made genuine discourse much, much harder. In the US, right now, the degree of polarization is so high that many people get all their news from sources with the same slant, only associate online with people who agree with them, hell, unfriend any high school Facebook friends who post things they find politically unpalatable. In what way is that "having to hear arguments you don't like or agree with"?

Anonymity does remove social ostracism, but I disagree that social coherence is a bad thing.