No you're not. Do you know the definition of rebelling? I can't rebel against something if I don't believe that it exists. This is as stupid as the Islamic argument for the criminalisation of apostasy that declares all former Muslims as have committed "treason".
I'm simply saying that sin is rebellion against God, transgressing His law/commandments.
Romans 3:23 for all have sinned and fall short of the glory of God,
Romans 5:12 Therefore, just as through one man sin entered into the world, and death through sin, and so death spread to all men, because all sinned—
Romans 6:23 For the wages of sin is death, but the free gift of God is eternal life in Christ Jesus our Lord.
Romans 8:1 Therefore there is now no condemnation for those who are in Christ Jesus.
Psalm 10:4 The wicked, in the haughtiness of his countenance, does not seek Him. All his thoughts are, "There is no God."
Psalm 14:1 For the choir director. A Psalm of David. The fool has said in his heart, "There is no God." They are corrupt, they have committed abominable deeds; There is no one who does good.
Psalm 53:1 For the choir director; according to Mahalath. A Maskil of David. The fool has said in his heart, "There is no God," They are corrupt, and have committed abominable injustice; There is no one who does good.