All of us, even, or perhaps especially, those we love to hate, are inconveniently complex. There is a cracker Florida expression that has made me think of Cromwell from the first time I heard it from one of the best political operatives I ever met. In describing a legislator who had justly earned his undieing enmity, he termed him "one o' them prism som'bitches. It don't make no nevermind how ya look at him, he's still a som'bitch." It looses some of the flavor when reduced to writing, but if you can imagine it spoken with "a chaw" (a wad of chewing tobacco in the mouth), and dripping with a mixture of sarcasm, satire and plain ol' venom, you'll be pretty close to the sense of the expression.