In all fairness, I think it's a mix of what @loonsun@sh.itjust.works wrote and those people having a much weaker moral compass, rather than them being full-blown sociopaths with no moral compass.

Or to put it in another way, even in people with a moral compass, if its a weak one, tribalism can override and even swith it off, so that even when faced with outreageous displays of what a normal person would feel is Unacceptable Evil they'll take the side of Evil if their "tribe's chiefs" are taking that side.

I think this justifies even more strongly your fear that this stuff spreads - a lot more people than just Sociopaths have both weak moral compasses (we live in an age were Society deems Wealth as the measure of the greatness of a person, not moral behaviour) and tribalist thinking is both more prevalent and more subtle.

Certainly that would explain how in some countries like the US there is still a majority (or at least a large minority) of people justifying and even supporting (usually by parroting "Hamas, Hamas, Hamas") the mass murdering of Palestinian children by Israel.