Christian culture is a stickler for the ten commandments with the patent exception of observing Sabbath.

American evangelicals tend to overlook this one. The closest they often come to formal observance is letting church out in time for kickoff. (This is actually church policy during football season in parts of the south.)
 

Sabbath means cease in Hebrew and its desecration used to carry a penalty of death. This seems like a harsh punishment for failing to cease, but if stress is a factor in fatal diseases then maybe the death penalty for ignoring Sabbath still exists. Who knows.