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A section of the British commentariat is discussing the history of antisemitism in Ireland, you say? If they actually read "Ulysses" instead of talking about it, they'd know it presents three antisemites in turn: a British nationalist, an Irish unionist and an Irish nationalist.
The British nationalist, in the opening chapter, railing against "German Jews" as the "national problem".
The unionist, delighted with his witticism.
And the Irish nationalist, entirely missing the joke. There's a message alright: narrow-minded ethnic nationalism of any variety is just as bad, and just as harmful to vulnerable minorities.
This was a nice article by Manus O'Riordan, convincingly IMO refuting the standard view that Michael Cusack was the model for Joyce's Citizen, with some broader comments about "Ulysses" and antisemitism. https://www.historyireland.com/20th-century-contemporary-history/a-citizens-defence-for-bloomsday/
I don't really hold with people relying on novels to understand a country's history, BTW; but you might as well read the thing properly. The gormless antisemitic "Britisher" in the opening chapter doesn't understand why Dedalus rejects the Church and the Empire alike.
If you were lucky enough to miss this choice morsel of discourse, some highlights here: https://twitter.com/tristandross/status/1282995827619827713
And here, hoo boy: https://twitter.com/DawnHFoster/status/1282789829852434443
