This is the explanation?

According to Charles Johnson, the author of Little Green Footballs, he has abandoned his formerly brilliant attacks on liberal lies, stupidity, and hypocrisy and has instead turned his attention to scolding conservative blogs because of sinister associations with European nationalist parties, associations with fringy representatives of the palecon right, and because conservative bloggers are too mean to Muslims and Barack Obama.

Hmm. I’m frequently pretty nasty about Islam, but beyond, as far as I’m concerned, he does not exactly strike a nerve.

I am sorry to see him leave, as I have for a long time had the highest respect and admiration for Mr. Johnson, who, it ought always to be remembered, made history by debunking the CBS News National Guard letter, and driving Dan Rather right out of the news business.

Charles Johnson personally made blogging into a serious and important factor in the 2004 Presidential Election.

I had seen LGF’s focus change, and I gradually quit reading it very often.

Finally, earlier this fall, I reluctantly transferred the LGF link out of my “Essential Blogs” category, and with considerable personal sadness placed it in the category reserved for hostile, leftwing blogs. I found Charles Johnson’s defection so depressing that I avoided mentioning any of this at the time.

Mr. Johnson’s change of heart and politics does not make sense to me. I could guess about his motives and psychology. I have my own theories, but I have never met Charles Johnson. I do not know him personally, and I see no point in sharing (quite possibly completely erroneous) uncomplimentary speculations of my own.

I don’t suppose that Charles Johnson will change back into being a conservative and Republican again, but I do still feel considerable gratitude and admiration for his contributions in the past. He is so intelligent that I think he must sooner or later quarrel with other people about other issues, and I will watch his future postings with interest. I do not agree with Mr. Johnson that the right blogosphere has a serious problem with racism, craziness, and hate speech, but I wish him well.

Charles Johnson’s Wikipedia entry

April 2009 Independent article on Johnson’s break with the Right.