Saying this make no justice to the fact that it's Saudi Sunni Arab Muslims, practicing, or not who suffer the most under the regime.
While Shia are the ones who suffer repressions by Saudi analogue of Stasi nearly all the time, the repression, domestic espionage, and political inquisition against Sunni populace is their primary activity.
Regular Saudis fear talking about Sauds even in their own homes.
I studied in Vancouver along tons of Saudi students picked among children of state employees, and ones given the "loyalty exam" to score their passport. Even among such hand-picked selection, people said nobody in the kingdom can speak about the king without chills running their spine. Were they having an option, they would've stayed in Canada.