This is the only compromise I would accept, otherwise I'm in favor of E2E with no backdoors. People who care about preventing CSAM and prosecuting pedophiles should consider this an improvement over the status quo.

I’m unsure what you’re saying here, can you clarify?

Is it that Baseline seems overly bureaucratic and will be ineffective, or that people should not support any CSAM lists at all?

The UN security council is hardly a non-entity. They aren't great at addressing certain kinds of geopolitically contentious problems, but UN peacekeepers have 12 active deployments. (https://peacekeeping.un.org/en/where-we-operate)

The UN security council is VERY effective at what it's actual purpose is, which is preventing all out nuclear war between the major super powers. That is why they are the ones with vetos.

Everything else is quite explicitly window dressing.

Mutually assured destruction does that. The security council has nothing to do with it. Also, at the time of its founding, the US was the only country with nukes, so that's not the logic behind who the permanent members are.

Ah, but not by many years. I guess it was more 'the global powers got nukes first', rather than 'the nuclear countries got the veto'. Interesting!