There are two groups among the general population that will be the most dangerous in a crisis.
1) Dork males with dependents - these are the group that post on forums that they "will do anything to feed their kids".........apparently anything except get prepared. They will find it easy to rationalize their way past any morals and do anything that presents itself as an immediate barrier to getting the resources they need for their dependents. They wont consider that they can plan or cooperate their way out of immediate problems. They will be "living in the moment" and will act spontaneously.
2) Psychopaths - At least a few percent of the general population, around 15% of senior business managers and more than 30% of prison populations are going to be psychopaths. They wont be constrained by morality.....they don't understand the concept. They consider people who do try to follow a moral code to be "suckers" and "losers".
Be especially wary of those from these professions:
https://en.wikipedia.org/wiki/Psychopathy_in_the_workplace