What's the next step now? Say something back to him. With bulging eye and twisted lip? Not at all. Say something back about the sources of "right wing" anger, which lie in, among other places, the media's servile devotion to Obama in 2008. Let Dionne fire back. Let others chime in. Talk. Discuss. It's what the Founding Fathers had in mind when they elevated to constitutional principle the free speech rights that John Milton had glorified in the "Areopagitica."
I speak from dogmatic bias, owing to 46 years spent in the, I'm afraid, mainstream media. A few things I still need to learn; many more I have imbibed through simple participation in the rituals and routines of the news business. Here is one: Mistakes and errors aren't pretty or desirable, but they clean up one way or another. The victim has the Founding Fathers' permission to yell to high heaven for justice and retribution -- or just a simple correction.
If the process isn't always agreeable to watch, life in general has lots of disquieting elements. Nor does freedom always provide happy solutions. It affords opportunities, which is all that's called for, even as the bloggers and Foxy commentators saw their chance, took it, and ruined E.J. Dionne's day.