Who is "they"? Those that hijacked Islam? What a crock, the best muslim on the planet is Osama bin laden.
When (not "if") freedom prevails, it's likely Islam will undergo some changes. It's inevitable.
The President's speech was for all Americans (including the muslim ones), and he's well aware people all over the world heard it or will hear/read excerpts. Tact is often a desired quality in a world leader.
Bin Laden is taking the big dirt nap and has become irrelevant.