The authors propose that the high levels of support often observed for governmental and religious systems can be explained, in part, as a means of coping with the threat posed by chronically or situationally fluctuating levels of perceived personal control. Three experiments demonstrated a causal relation between lowered perceptions of personal control and the defense of external systems, including increased beliefs in the existence of a controlling God (Studies 1 and 2) and defense of the overarching socio-political system (Study 4). ....The implications of these results for understanding why a high percentage of the population believes in the existence of God, and why people so often endorse and justify their socio-political systems, are discussed.
Basically, the more powerless you feel, the more rigidly you believe in authoritarian systems above you: a controlling God, rather than an accepting one; an authoritarian government, not a benevolent one. Us vs them.
Or put another way, if the rigid conservatives were not insecure, they might not be so rigid.
I suggest that one has to give oneself up to the insecurity and embrace it to be free of it.
Maybe that's just me.