What if Satan was benevolent?

Well as Satan is the ruler of Hades as the Bible says yes he is ultimately out there to trick people into falling prey to sin but the Bible also says that Satan is only fooling himself Because in John Jesus said when Gods saves you He holds on tightly and discloses Himself to you and no one can snatch His children out of His hand. Isaiah says Satan decieves himself for he cannot snatch Gods children from His hand. Isaiah 46:9-10 also says "I am God and there is no one like Me creating the end from the biginning and the not yet from the ancient times saying 'My counsel shall stand and I will do all that is in my Holy pleasure"