. . . Part of the Balance Fallacy.
All such arguments boil down to saying that half a loaf is the same as no bread.
George Orwell on Broderism sixty years before Broderism.[9]
In political journalism, a similar phenomenon often referred to as "Broderism," after the late David Broder, former senior editor at the Washington Post. It is often said that there is no single scandal, no matter how overwhelmingly partisan, that he couldn't find some instance of the other party doing something maybe, kind of, almost close to being in the ballpark of the same thing, so that every thing wrong in Washington is the fault of both parties. An example of Broderism would be that, while many Republican elected officials have embraced Birtherism wholeheartedly, these one or two Democratic supporters are (insert whacked conspiracy theory here),[10][11][12] so each party is equally crazy.
On Fark, similar arguments are referred to as "BSABSVR," short for "Both Sides Are Bad, So Vote Republican."