The SEP doesn’t say how it or anyone else should go about building a ‘socialist anti-war movement’ though. I can only conclude they mean that everyone should join the SEP. This goes a long way to absolving the SEP of also failing to have stopped the ongoing genocide of Palestinians and Israel’s war on neighbouring countries.

Is the SEP involved in any of the anti-war coalitions in the UK? If so are they just as relentlessly cynical and negative when working with other independent activists and organisations in person? Or do they just snipe from the sidelines without getting involved?

Nah it’s a much dumber situation than the one envisioned in Terminator because there’s no intelligence in it or behind it.