That finished him for me as well. I had already tired of his rather artificial "right down the middle, they're both wrong" positioning on almost every issue; once you've figured out his schtick, its rather obviously calculated and fraudulent. But I noticed who went after the Vets and I haven't forgiven it.
O'Reilly will never go conservative on every issue. But I love the way he's been hammering the leftist media as of late.
Don't forget to include Shep Smith on your list. During that same period he closed one of his shows by mentioning the Swiftvets and then saying "those liars".