Well, for instance, A Heat Vampire in Search of a Movie Deal, which was tweeted with approval by Asher Wolf. Shortly after reading that, I was reading some comments section on a news story in which several people made similar points in brief. I haven't been able to find those comments to cite an example, so maybe it was just a coincidence and I'm reading too much into it. That is, I'm used to seeing right wing criticism of Greenwald, and I was surprised that I thought I was suddenly seeing a trend towards more left wing criticism of Greenwald, but that may have been wrong about that.
The definition of "ultra-left" I'm using refers to a strategic judgment -- in this case, is this the right time to emphasize criticism of Greenwald, or is it more important to emphasize supporting Greenwald, and just criticize Greenwald parenthetically?
I'm leaning towards the latter, especially after plowing through the Guardian's comments section and finding almost all the criticism of Greenwald coming from the right, along the usual lines of, "There's no dangerous state surveillance apparatus, and besides, I support it."