Perhaps, when one considers the story of Noah and the ark, there may be an understanding of the Prepper mindset. Noah was a Prepper and devotedly a believer and he saved humanity. What better role model can one have?
As for the idea that the masses will turn into murdering thieves in the event of a national or world wide catastrophic event, that is probably correct, especially in the urban areas. How long this would take is dependent on the situation. Within 24 hours food stores could be emptied of food and if gasoline, water and power is effected Marshall law would be quickly enacted, which may exacerbate the problem. If there is a breakdown of government services, military authority, I would hope you have a gun.
There is a reason for the term, human animal.