I downvoted you, and I’m pretty sure I’m not a bot. I did so because failing to lock up people that commit serious crimes is prima facie extremist - no citation is necessary.
Downvoting (from what I gather) is supposed to be used not as a disagree button, but rather as a tool when a comment doesn't add value to a conversation, hence why downvotes are so restricted on HN.
You had a viable argument right up until that point!
Edit: Thanks for the bot downvotes! Going from +2 to -1 in the span of a minute on two separate comments is a bit of a red flag :P