[foobarchu]

I think its demoralizing because it's active blaming. Charlie doesn't have an attitude problem just because he doesn't like being publicly blamed for something, Bob has an attitude problem because piling it on somebody else is his first reaction.

The proper thing here is to acknowledge that there is an issue, but not assign blame. Go to the person you think is responsible in private, and let them admit the mistake in public if they want. Assigning them blame publicly shows a huge lack of respect, even if it was their fault, while admitting blame freely shows modesty.

Plus, what if it's not Charlie's fault, and his commit simply revealed the problem? Perhaps the actual issue is in a little used function deep down in the codebase, and his commit is just the first one to actually exercise that area the right way? Maybe this whole thing comes around to being Jim's fault instead.