the defence will throw out every possible juror
There are other judging systems beside the Jury System. Here, in 1960, after Adolph Aichmann, head of the extermination under Hitler, was caught, the supreme court assembled 8 judges which tried him, brought witnesses, and he was found guilty because all evidence showed so. Same goes for Saddam - there's more evidence and witnesses than you could view and hear in a life-time, all pointing to him being god-damned guilty.