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I remember reading somewhere that kosher/halal laws are much less about the laws themselves and much more about the group identity they foster. I imagine the obscurity of Catholic mass fulfills roughly the same function.
What you're saying makes a lot of sense to me.
Lux “Ask Me About Self-Managed Abortion” Alptraum on Twitter
“I think fundamentally there is an us v them mentality built into Judaism that exists independently of antisemitism. A lot of traditional Jewish practice — especially keeping kosher — is about a forced insularity that separates Jews from non-Jews.”