Hard to call it a conspiracy theory when he's a Zionist.
Please find below the composite motions passed by Labour Party Conferences 2018, 2019 and 2021 on Palestine. 1. Palestine Motion, Labour Party Conference 2021 Conference condemns the ongoing Nakba …
labourandpalestine.org.uk
I believe 2021 was the last update. Labour's - and I am assuming by extension Starmer's - position remains that the answer to Israel-Palestine remains a political two-state solution that guarantees the freedom, rights, security and prosperity of Palestinians in their own state, and which specifically criticises Israel for every greater encroachments on Palestinian land.
The question then is what sort of "Zionist" Starmer is. If we want to say he believes in the right of the State of Israel to exist, yes he is a Zionist, but in a way that is uncontroversial, probably even for you and Sean. If we mean that Israel has a continuing right to steal land from, oppress, and deny the Palestinians independence, then from available evidence he is not, and calling him one is just inaccurate.
However, even someone not a Zionist under the latter definition can support - hopefully within limits of proportionate action - Israel's right to defend itself and its civilians. The obvious problem being that Israeli military reprisals against Gaza are not proportionate, which is why Starmer (and just about everyone else with the possible exception of Biden) are rowing back on the their earlier, bombastic support.
And why just about every major leader in the West was such a fucking idiot for being so gung-ho.