[nonsporting]

Good on the Baptists. ...

My Greek professor referred to this construct as the "dative of disadvantage." (The joke is probably lost on 99.999% of the population.)

The proper prep. is "Good for the Baptists."

One more "p" and you've got a candidate title for Baptist sermon.

[CatoRenasci]

Actually, "good on" is a British (and Australian) construction which, while not strictly correct, as you point out, is idiomatic U-usage. "Good for" is more strictly correct, is usual in the US, but is almsot a non-U indicator in England. I was having fun with the language and as the Brits would say "having you on" if you're a language Nazi.