Matthews here is pointing towards a key aspect of democratic societies that is being neglected in increasingly troubling ways both in the United States and Europe. Democracy by definition is pluralistic. I strongly believe that despite the way we typically think of democratic processes (particularly voting) as majority rule, democracy must include empowering and allowing a voice for the minority (or more accurately, minorities; and by this, I mean any person[s] either not represented by the majority, or neglected by its policies). As evidenced by the latest parliamentary election in the Netherlands, this idea can be rapidly forgotten amidst fear and xenophobia in the face of cultural change.
If we are to retain the idea of democracy any longer, we ought never adopt platforms which seek to homogenize or exclude. Rather, we should be vigilantly generous and hospitable; inviting the Other in, and seeking out any voice which is not being heard.