"Turning back" here is an idiom for "changing directions toward." This is the first of two rhetorical questions. AT: "you should not go back to ... principles." or "you should not change back to ... principles." (See: [[rc://en/ta/man/translate/figs-rquestion]])
This question can be translated as a statement. AT: "You should not want to be slaves all over again!" or "It seems that you do want to be slaves again." (See: [[rc://en/ta/man/translate/figs-rquestion]]) "Enslaved" is a metaphor for the way their former customs controlled their lives, like masters. AT: "It seems that you want to be controlled all over again!" (See: [[rc://en/ta/man/translate/figs-metaphor]])