Mr. Shinohara will immigrate future dictators and hated people to America, to stop World Wars before they start, and other major adversities of the 20th century. What do you think could happen in those cases?
Others will take their place. Especially in the case of Saddam, where the CIA will simply choose another puppet to install in Iraq. And the repercussions on history will be massive. (And believe me, if this intervention results in the purging of anime from history, I will fight it tooth and nail.)