O'Reilly was always a study in cowardice. If you watched him take on a guest of a different political persuasion who was evidently weaker than O'Reilly--a small woman or a small man--O'Reilly, who is a large man,  was as nasty and threatening as he could be.  However, if the guest of a different political persuasion was a large, healthy man, O'Reilly was very polite.