Well, more than W, but most of the blame should go to the actual bastards doing the horrible acts.
That's like saying that Neville Chamberlain and the Allied countries that imposed the terrible Treaty of Versailles terms shouldn't be blamed at all for Nazi Germany and all of the blame only goes to Hitler and the Nazis. Well of course the Nazis alone are primarily responsible for their actions, that much is obvious. But that hardly exonerates the other mentioned people whose actions both led to their rise and were quite obviously foolhardy, even at the time.