The true purpose of goy-boy-Bush?
Not sure what you mean there. I don't think Bush is on strings controlled by the Mossad.
Bush wants to end the regime in Baghdad for personal and political reasons. Remember, Saddam tried to put a hit on his dad. For that reason alone W would want to take him out. Plus, his funding of war machines, his megalomaniacal nature, his desire to build WMD, and his connections to the CIA are probably all more reasons to take him down.