Just the latest example. Let's see if the progressive history bloggers will jump on this one. Don't hold your breath.
"The incorrect description of 'the right to keep and bear arms in a
state militia' above makes one’s right dependent upon’s one’s membership
in a state militia. The founders believed, to quote William
Blackstone, that the right to keep and bear arms was an individual right
‘auxiliary to the natural right of resistance and self-preservation." ~ David Corbin, PhD, Professor of Politics at Kings College in New York
And the Supreme Court affirmed that interpretation in Heller in 2008. It appears that the authors do have a particular agenda regarding American history. Surprise, surprise. Of course, as long as the agenda tilts left, then that's just fine and dandy, isn't it?