“The Giver tells him not to trust the limited thoughts that have been given to him, but to trust what is inside”
That is exactly the advise that the left and totalitarians give in general. Trust your “feellings” not logic or reasons.
Logic, reason, and skepticism are what make conversion from “established truth” possible.
And oppose all limits on your behavior too! Why can't a man marry 3 dogs and a donkey? Who are you to limit that?