Somehow casting found two unrelated men to play the Winklevoss twins. I suspect that they grafted Armie Hammer's (Armie??) head onto the other actor's body. He or they looked like Brendan Fraser from George of the Jungle days.
For reals? Did you check this in the credits? I've been reading a lot about this film, and what I've read is that Armie Hammer (born Armand Hammer--I suspect a descendant of the Armand Hammer, of Occidental Petroleum, but I haven't investigated) played both "Winklevi" through old-fashioned movie magic. In his IMDb entry he does sorta look like a younger Brendan Fraser with a blond dye-job.
Did they really have no moral compass at all? What motivated them? How could they be so brilliant and yet so un-self aware?
Well, I can't explain it, but in the
New Yorker article about the film, Mark Zuckerberg comes across as totally lacking in empathy, so I can believe it.