There is nothing that I am more sure of than the fact that God exists and that He created the multi-verse. Everything else I believe is subject to change, improvement, evolution.
To answer your strange question, if a person held a gun to my child's head and demanded that I renounce God in order to save my son's life. In that case, I would not hesitate to renounce God in an instant. I hope you would understand this without me needing to explain but I fear you won't or you never would have asked it.
God is not judging you on what you say or do here on the earth. Nothing is held against you.
Could you stop loving your son because he strikes out in the last inning and fails to bring home the runner on third base? Some things are just not possible. Any father who condemned his son for such a truly insignificant thing would not be much of a father.
God is not jealous. What could He possibly be jealous of? He does not anger. He does not judge, tempt, torture, or kill any life. These are human traits. Is it so difficult to believe that God is above these pitiful human emotions?
This place is not a test, it is a unniversity, one you volunteered to come to. Just because I swear that God does not exist does not make him cease nor does it really change my belief. Free will is God's gift to all and nothing has the power to change it.
Nothing.
Religion simply helps some see a few tiny rays of sunshine that they would not see otherwise. Some day they will realize that the light flows freely to us, it surrounds us, it is us, and it is everpresent.