After all, the rule of The Majority, or even the tyranny of The Majority, is what the word democracy means - from demos, 'the people'. Perhaps Andrew Puddephat is right. Perhaps democracies have always persecuted minorities. But even if he was right, what he means is that democracy is a bad thing, and he should say so. Well, in one sense, yes, of course it does.
Majority rule implies that the minority loses.
But the idea that the minority which loses in an election or an open debate has to be a racially distinct minority, like blacks, or that it must be a persecuted minority, like lesbians and gays, does not follow at all. In fact the more open a democracy the better chance there is of challenging those kinds of prejudice. The case for democracy eludes professionals like Guinier or Puddephat. That case is not just that democracy is orderly or moderate - it need not be any of those things. The real case for democracy is that, potentially, majorities will make better decisions than minorities.