You know, Billo is fun to make fun of because he is so pompous, bombastic and arrogant.  These are tough qualities to take in anyone who is right all the time.  They are especially tough in someone who is wrong more often than they are right, like O'Reilly.  Notice in this clip, O'Reilly never gives us a definition of a civil war.  Without a definition, he's just talking out of his backside. 

I discussed the definition of a civil war and I actually quoted an expert on this post here.