In 1729 a French katlick priest left behind a will or testament to his flock and humanity at large. This book has appeared in many versions; like by Voltaire making our atheist priest a deist or by D’Holdbach making him an atheist. It makes for interesting reading.
He writes among his proofs for the falsity of religion the claim that a good god would command animal sacrifice.
Blessed be the nations who treat them (animals) humanely and favorably and who take pity on their misery and pain. But, cursed be the nations who treat them cruelly, who tyrannize them, who love to spill their blood and who are hungry for their flesh.