"I set My rainbow in the cloud, and it shall be for the sign of the covenant between Me and the earth. It shall be, when I bring a cloud over the earth, that the rainbow shall be seen in the cloud; and I will remember My covenant which is between Me and you and every living creature of all flesh; the waters shall never again become a flood to destroy all flesh. The rainbow shall be in the cloud, and I will look on it to remember the everlasting covenant between God and every living creature of all flesh that is on the earth.” And God said to Noah, "This is the sign of the covenant which I have established between Me and all flesh that is on the earth." Gen 9:9-13
The original rainbow was not a flag, but it served the same purpose. When a flag is raised it declares a message; it sends out a call; it inspires those who know what the flag stands for. These days the rainbow has been reduced to a bumper sticker, and it’s message is “diversity” and those who support the homosexual movement are inspired by its message. But the first rainbow was not a bumper sticker, or a flag. It was a natural phenomenon…it still is.
Author Donald Ahrens in his text Meteorology Today describes a rainbow as “one of the most spectacular light shows observed on earth". Indeed the traditional rainbow is sunlight spread out into its spectrum of colors and diverted to the eye of the observer by water droplets. The ‘bow’ part of the word describes the fact that the rainbow is a group of nearly circular arcs of color all having a common center.”
But the traditional meaning of the rainbow has always been the Biblical one that God promised never to destroy the earth with water again. In Revelation 4:3 and 10:11 the rainbow is found very close to God because Revelation is a vivid picture of God’s faithfulness in history. He will keep His promises and nothing we can do will prevent that, anymore than we can interfere with the sun and the rain. We must understand that God will judge this world again, only this time with fire, not water.
“…knowing this first: that scoffers will come in the last days, walking according to their own lusts, and saying, ‘Where is the promise of His coming? For since the fathers fell asleep, all things continue as they were from the beginning of creation.’ For this they willfully forget: that by the word of God the heavens were of old, and the earth standing out of water and in the water, by which the world that then existed perished, being flooded with water. But the heavens and the earth which are now preserved by the same word, are reserved for fire until the day of judgment and perdition of ungodly men.” 2 Peter 3:3-7
God does indeed love all of His creatures, and He offers us all a chance to repent of our sins and be saved. One of those sins is homosexuality. God did not provide the rainbow to forgive homosexuals or any other sinners. He provided His son for that, but without repentance there is no sacrifice for sins. (Hebrews 10:26)
Hell will certainly be a place of great diversity. Heaven is for those who repent and are baptized into the ONE Body of Christ, where there is ONE Spirit; ONE Hope; ONE Lord; ONE Faith; ONE Baptism; One God and Father of all who is over all, through all and in all. (Eph 4:4-6)