Answer and Explanation:
Faust had a stubborn resistance to God at the beginning of history, because at that moment, he has the free will of his choices, but chooses to depart from the precepts of God, because he feels the need to turn himself into God and act according to his own will. In this case, we can agree with the students regarding Faust's obstinacy.
However, in the course of history, when he sells his soul to Mephistophilis, he loses all his free will and is therefore unable to maintain this obstinacy. At that moment, the rule of God that he presents is not the result of obstinacy, but the result of the loss of his soul.