You're right - bogosity is bogosity no matter who does it.
Maybe I'm stepping over the, uh,
political line in this forum, but it's quite a valid observation (and a generalization), that conservatives the world (not just US ones), have a tendency to compartmentalize information that does not comport with their beliefs. See, conservatism isn't an economic theory, it's more a cling to power. A Russian conservative would be a communist, for example. This isn't to say that there aren't principled conservatives (although most of those have been run off of late). Anyway, this compartmentalization leads a tendency to forget ones own position when decrying anothers. It's not necessarily a conscious thing, but it doesn't make it right either.