Yes, He killed those who where evil in Noah’s day. But he saved Noah’s family of eight. Having the ability and not killing is a sign of humility. God repeated of drowning people. He said he would never do it again. He put a rainbow in the sky, after a rain, to remind him and us that he would never do it again. These days God decided along time ago that he would save everyone by Gracie of God. And sent His only begotten Son (Jesus Christ) into the world to pay the price for all Sinners. So what will happen to other religions. Saved by Gracie! As are you. But, you can accept Jesus Christ’s death for you and become a member of God’s family.