Yes, Dreyfus did play Yoni. I still haven't seen Munich, but I do want to see it. SoG was pretty good.
"I still haven't seen Munich, but I do want to see it."
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You might consider watching "One Day in September" first, before watching Spielberg's version "Munich".
http://www.imdb.com/title/tt0230591/
It gives a much more balanced look at what happened at the 72 Olympics rather than the slanted view that is apparently presented in "Munich".