I think Matt and some of the commenters here are missing a pretty basic point, though I generally agree that discrediting Donohue, once and for all, is a laudable goal.
This isn't going to be about a bunch of blog posts deploring the political positions of the Catholic Church. It's probably not going to be about McEwen's posts at all, or most of Marcotte's. Mark my words, it's going to be mostly about the single Marcotte post with these lines:
Q: What if Mary had taken Plan B after the Lord filled her with his hot, white, sticky Holy Spirit?
A: You'd have to justify your misogyny with another ancient mythology.
One commenter probably had that in mind when he or she referred to some of the blog posts as "cringe-worthy," as did another who accurately suggested Marcotte was attacking not Vatican positions on abortion or birth control but a central theological tenet of Catholicism (and for that matter, of all orthodox Christianity).
In the impending fight with the thug Donohue, which I'm all for waging aggressively, the real audience that matters is going to be rank-and-file Catholics who need to be disabused of the idea that organizations like the Catholic League in any way speak for them. Liberal Catholics are the most credible spokespeople in this fight, and I don't think it does much good to lecture them on what they are allowed to admit or deny--or permit to be said on their web sites--in making that fight. Give them some space.
After all, nobody seems to be getting publicly angry at John Edwards for saying some of the posts personally offended him, right? Whatever your personal opinion of the Christian Left, we're not going to win this one without them, period.