One of many despicable things that has been happening lately.
Having travelled a bit here and there, I am not badly versed how to behave in the face of different cultural beliefs. But when faced with such quandries here, in my home country, I find it hard to decide how to respond. Clearly, events like this require some thought before commenting.
The words of Charles Napier come close, though. Among other things, he conquered part of what is now Pakistan.
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.