"And shall God not avenge His own elect who cry out day and night to Him,
To use a rainbow as a symbol of something that is anathema to God is a real sacrilege, and a type of "in your face, God" expression of rebellion. I think I would think twice about that before using God's rainbow as a symbol of something we know that God hates.
But there is one condition...REPENTANCE. Repentance means to turn away from sin...to change one's mind and heart and behavior. Jesus told about the woman taken in adultery in John 8:1-11. According to the law, she should have been stoned for her sin of adultery. Jesus said to her accusers, (verse 7)
GO AND SIN NO MORE!."
old things have passed away;
behold, all things have become new."