I don't necessarily disagree, but it's somewhat complicated for me. A kid with a penknife, nobody indicates he was within range to actually harm the officers or anyone else. Surely there was something else that could have been done. Tazers? Back up and talk him down some more?
I'm not some crazy SJW dickhead, if he was intending to attack police officers they're within their rights to protect themselves, it just seems somewhat extreme to me that a kid with a knife is met with gunfire. It's a threat for sure, and measures must be taken, but this seems somehow disproportionate.
I'm not saying they should wait until he's hurt someone either, but it's not like police don't get training for dealing with people like this. For all we know the kid was having a mental breakdown or whatever and needed help, instead he got dead.
Like I say, i'm not blaming the police for what they did, we can't know the full story from this article, but I can't imagine this was the only possible outcome.