Fun fact, a goyishe in-law of mine has said this to my face. It was offensive when she said it, and it's offensive when you say it.
I won't debate that but I'll leave you with a famous quote, "A Goy from New York is more Jewish than a Rabbi from Des Moines"
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Insanely offensive attitude. My rabbi was so upset.
Besides, I'd be very impressed if someone actually read and understood over 40 volumes of Jewish case law. There's a reason Daf Yomi is a thing.