The whole point of that (awful [1]) movie was that they artificially arranged to have the clones grow up much as Hitler did. The first few scenes have hitmen killing the clones' fathers at the same age as the real Adolf.

[1] Well, at least Steve Guttenberg and Lawrence Olivier got to be in the same film. It was either that or Police Academy XII.

Yes. A recent twin incident proved that nurture plays a surprisingly large role, larger than was expected by the investigators.

http://www.bbc.com/news/world-latin-america-35220779

I'm not sure, the article doesn't mention any of that.

It actually tries (weakly) to claim the opposite, with statements like "Carlos and Wilber both had very similar white mobile phones" and "We are a little bit more ego-centric, bigger flirts."

Nothing about nurture playing a role though.

It's the first article I could find that referenced the twins in question. But researchers said they were surprised how much impact upbringing had. Unlike a lot of twins separated at birth, these were raised in very different socioeconomic circumstances.

Project about them: http://drnancysegaltwins.org/bogota-twins-project-gallery

The best reference I can currently come up with is this comment by tokenadult who has a longstanding interest in twin studies:

https://news.ycombinator.com/item?id=10100109#10100644

generalizing that idea just a bit: what if, for each murderer who was executed, the government cloned that person first, in an effort to allow them to have a normal, crime-free life?

would it count as a form of rehabilitation?