The proper answer to such gambits was formulated in the 19th century by General Charles Napier when dealing with sutte, the Indian custom of burning a widow on her husband’s funeral pyre: “You say that it is your custom to burn widows. Very well. We also have a custom: when men burn a woman alive, we tie a rope around their necks and we hang them. Build your funeral pyre; beside it, my carpenters will build a gallows. You may follow your custom. And then we will follow ours.”
What a great quote (and custom).
Sounds like General Charles Napier was a smart fellow.