monochromatic flag referred to as a “no quarter” flag

Intent or not, that’s what it is, the black flag or no quarter flag is one that states I will kill you dead even if you surrender.

Chuds think this means they’re tough manly men, what it really means is a declaration that they cannot be trusted with anything for any reason. It’s broadcasting to the world that you don’t intend to abide by any rules of engagement so it’s best to just blow you off the map pre-emptively. Flying this flag, even if you don’t even engage with an enemy, is itself a war crime according to the Hague conventions.