And the gay flag is not controversial go away you troll
The rainbow flag is not associated with any religion, troll. It is a symbol of unity and welcoming. Many houses of worship fly it, including many Christian churches.
Government buildings should not fly religious banners. This would signal government support for one faith and not another and support for one sect over another. Don't act naive because you clearly are not. As a sectarian matter among Christians: how many people, regardless of belief and sexual orientation, would see this flag as an affirmation, not only that the Christian faith dominates the city, but also that the city's Christian inhabitants support the likes of graham or jeffress and the other disgraces to the Christian faith?