One could calmly point out in appropriate venues that even the symbolism is a lie. I believe the original use was to show that by embracing all the colors, that it was supposed to be about “inclusiveness.” But if you believe there’s no valid way to please God by doing that, then bye bye inclusiveness for you. It is totalitarianism. You don’t even merit being a color.
Considering that The Almighty told Noah He would put his bow in the heavens after a rain as a sign He would never again destroy the world by water, the homosexuals co-opting that sign to ‘celebrate’ what is noted in scripture as an abomination to Him is a slap in the face to The Almighty Himself.