IBM supposedly traded with the Germans (who cares now??), and Charles Lindbergh was a Nazi supporter. Hanoi Jane was a traitor who gave aid and comfort to the enemy in time of war. Many liberals were ardent fans of and apologists for communism.
I still fail to see your point. What does Bush's grandfather have to do with anything?? Is your family tree so pure?? Mine probably is not, but I don't worry about it since it only matters who and what I am.