1) That email has been circulating the web since the Force MD's broke up.
2) Robin Williiams never said any of it.
"One would expect a piece written by Robin Williams to be smart and funny, which this lackluster rehash of the sort of lowest-common-denominator foreigner-bashing one would expect to hear on right-wing talk radio is not. Apart from the final quotation (an actual quip, sans original context, from his comedy act), Williams — a so-called "San Francisco liberal" whose political views have angered conservatives and earned him billing on at least one Internet-posted "celebrity blacklist" — clearly did not write the thing.
Who did write it remains a mystery, if not a particularly interesting one. Early versions circulated in March 2003 before the Robin Williams tagline was added went entirely uncredited."