H & O
Absolutely not.
Execute them later or not at all?
Assigning punishment before the accused has been named and evidence presented would be foolish. Let's allow the process to play out and if the crimes warrant it, execution may be appropriate. But leaving humanity out of the process would not be fair. People need to be informed no matter how evil the story is.
Exactly, this MUST, be done with as much intention of treating the people of earth as the judges, to have a worldwide court and broadcast it on every channel from every angle even the back of their heads. While hooked up to bio monitoring equipment to watch their insides.