It’s so much better than that though. He won’t murder him just for being a piece of shit. He spent the entire episode of peacefully resisting but refusing to harm another sentient being, even to free himself. He values life to such an extent that he won’t take it unless there is no other option, and he had all the time in the world to attempt to escape.

But Fajo changes the equation when he not only murders someone in cold blood, but makes clear that he will do it again and again if that’s what it takes to get what he wants out of Data. In this situation, Data unemotionally, logically determines that the only moral course of action is to kill him. Not in the heat of the moment, not in immediate self defense, just gunning him down where he stands because he cannot be allowed to continue.

It’s a chilling moment, and I love it. I just wish they hadn’t felt the need to insert that line about the weapon going off by accident. It comes across as a lie, and I think it undermines the episode a little.