Dana Milbank of the Washington Post made a major accusation today against Representative Al Green (D-TX): that Green "pound[ed] his fist" in the air in what appeared to be a "fascist salute," aimed at President Obama, according to Milbank.

But I'm confused, for when I search "fascist salute" in google, I get a bunch of images of Mussolini and other fascist making an open-hand sign, as opposed to a fist.

Could anyone else here confirm that the fascist salute is an open-handed one?
I have to point out that even if it were in the form of a fist, no serious person could conclude that simply clenching one's fist constitutes evidence of intention to make a "fascist" sign.

Media Matters condemned Milbank's remarks.