What's wrong with this sentence?

David Postman talks to McGavick (my emphasis)…

"On civility, he said Cantwell and the Democrats — he uses the GOP-approved appellation "Democrat Party" — are running a "good cop/bad cop" campaign..."

How can you talk about civility in politics when you deliberately use terminology for your opponent that is both inaccurate and insulting?

"Democrat Party" may be a minor slur, but it's an intentional one, a legacy of the Gingrich era, the time when the wheels really came off the notion of civility and collegiality in American politics. There is no "Democrat Party," McGavick knows it and everyone, including the media, should be calling him on it.

Because there's really only one way you can talk about civility in politics and use derogatory buzzwords to describe your opponent.

You have to be a hypocrite first.