If i read properly, Altemeyer acknowledges that there are indeed left wing authoritarians, but his samples of North American population don't have enough of those to make a representative study. LWA would be the "follow the revolutionary leader type".

On the other hand, studies made in Russia with his methods, after "glasnost" indicated high RWA profiles prevailed in  "communist conservatives".

If i read you right, i think i agree that we are talking about the same psychological profile only shaped by a different narrative, or frame, or myth... I'm just saying i think altemeyer hints at that, but doesn't state it for lack of substantial studies.