She's right, but for the wrong reason. Tojo wasn't one of the war planners and Hirohito was. Tojo "took one for the Emperor" as he was obligated to under Bushido. We didn't try Hirohito because we wanted a nice stable government for occupation, and because he really was being held prisoner by radical officers who wanted to prolong the war. But he was many times more guilty than Tojo.
But nobody's gonna buy her Tojo was just a big misunderstood teddy bear crap.