Mismanagement and misplaced grievances.
The former is the cause for 99% of the problems societies face.
Essentially, conmen will con useful idiots, and then the useful idiots will get mad at their peers instead of their rulers because it’s easier.
Stupidity is also a major factor, because useful idiots aren’t capable of understanding how they’re being taken for a ride.
Why is the economy struggling while rich people live in luxury?
I’d say what’s causing people grief is a bigger trigger for fascism than how they react to it.