It is because of something the left sold off awhile back: Honor.
No more.
Kerry lies about Vietnam and his fellow troops and gets away with it.
His wife hides her finances and gets away with it.
Pres. Bush is slandered for four years, called every name in the book, and the slanderers get away with it.
Now, CBS gins up some phony-as-hell scraps of paper, using dead people and corrupt democrat politicians like Ben Barnes, and that is a line that will not be crossed unchallenged.
Think of the straw on the camel's back.
Ed