This is an odd hill to die on, especially for an attorney who knows how the US legal system works. Everyone, no matter how despicable, is entitled to legal representation.
You see a similar "code" in medicine. For instance, when the Boston Marathon bomber Dzhokhar Tsarnaev was arrested by SWAT, he was taken to the hospital and treated by doctors for his wounds. The medical staff wouldn't even think of objecting to treating a known terrorist, because their duty is to be physicians.