I think you have pretty accurately summed it up. I think, though, that the daughter of Dick and Lynne Cheney probably has learned a thing or two from her parents about how to handle this kind of crap....
Yeah, they're so open minded... as long as you agree with them.
They're just mad that they haven't been able to use Mary Cheney as a "useful idiot" the way they used to use Patti Davis.