"Having said that, let's see what your evidence is for your statement that theocracies are more likely (than what) to abuse the people."
Well, for one thing, by their very nature, they view those who adhere to the State's religion as being "better" citizens than those who do not, and creates a situation where the State ennact laws, and enforces societal behavior based on the religious beliefs of the majority of the people, over the wishes or beliefs of the individual.
With the passing of time, it eventually becomes just the will of those who guide the Church, and those who guide the Church are not elected by the people.