Rainbows are sexless and belong to everyone gay or straight they look much better in the sky and not hijacked as a flag.
The Old Testament declares God hung up his bow in the sky for all time as a sign He would never again bring a flood onto the Earth.
A much better story from the ancients than this political movement trying to force public bodies to hang a rainbow flag from public buildings so as to be seen in some form of acceptable political correctness, I am sure there are many who do not agree with my position.