I could see that, maybe we see the Jewish Labour Bund’s of OTl are given money and security to start there own communes. I could a split though within these groups between those who want to establish communes in Russia and those who would go to Palestine or America instead.
Zionism was mostly something birthed out of Britain to my knowledge. I don't think it would grow in popularity that much away from it if there's other credible alternatives. Might be that you're only left with right wing Zionism for Palestine with support of the British Empire and a left wing Bundism who want to settle in Russia?
True, though instead of a Communist Party you probably get a more unified Syndicalist/Far Left Party to combat Labour which could win a few seats. Maybe like a more successful BSP than OTL.
I can't see radical syndicalism getting roots in the UK when the vast majority of unions would integrate in Labour as OTL. Labour probably has a reform syndicalist wing challenging the state socialist wing a bit more. But the far left contender is probably more likely to be OTL left communists and the like, including their pretty stark criticism of trade union bureaucracy which would land well with leftist fed up with Labour.
How about those guys?
https://en.wikipedia.org/wiki/Communist_Party_(British_Section_of_the_Third_International)
OTL the comintern aligned communist party left them out to dry because Lenin didn't like Left Communists but here they could probably collect some more support from revolutionary internationale aligned small groups.
Though I bet they would be abstentionists, especially above the local level.
All could be possible, I could see American elites seeing it as a way to secure there hold without losing there power. Maybe it interests various Army folks too. Clerical Fascism would probably work best in Catholic countries like Ireland, France and Italy. Would be funny if Italy is divided between Futurist Fascism and Clerical Fascism.
Futurist North Italy/Lombardy, Clerical Fascist South Italy?
Maybe the mess also let a lot of Italian leftists escape to Russia? It'd be interesting to see what someone like Bordiga makes up of it? He could be influential in filling in the missing holes in criticism of capitalism left by the absence of Capital, while also arguing for relentless internationalism, while Gramsci would fit in well with the people arguing for building a proletarian culture to counter bourgeois culture's hegemony, like proletkult. Could play around with Bogdanov, he might not fade into irrelevance with a weaker Lenin and could still be part of the RSDLP.
As for other fascist countries... I can see clerical fascism being reaction's weapon in Iberia, potentially in Latin America too.
Ireland, I doubt it, because lefties always fit well with its struggle for independence. Maybe here the non Marxist socialism makes it easier to have a coherent socialist movement despite the largely agrarian population and you get a strongly unified socialist independence movement, including christian socialism on the more conservative side?
In the case of France, it kinda depends on how WW1 went, doesn't it?