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Acumen's system brought us here. [One question at a time.] As for why, it's because we're judged and sentenced for our crimes and actions, since he viewed them that way. So what we believe are good action for a good cause, he see as a crime anyway.
And lastly...well, he's an AI, so he's programmed that way. So your question is probably better off directed to his creators, where ever they are.