So, if I understand your hypothetical scenario: if there is a natural disaster that destroys our infrastructure and many people die, would worship on a particular day be the focus of persecution? I still disagree that the day of the week would become so important. However, I do agree that people would focus on basic survival needs. Stealing food would become more commonplace, for instance. Killing to defend oneself would also become much more prevalent. The basic instincts to survive would be exhibited by all, including the vast majority of Christians. Christians would regularly become violent to protect their home and their children, for instance. Real Christians, of course, would not be stealing food to feed their families - they would trust God, like the "birds of the air." Real Christians would not become violent to protect their homes and their children - real Christians would not "resist evil". In your scenario, I do not see how Christians become the focus of persecution. Unless, the worldly people blamed the Christians for the catastrophes.