Passage Romans 1:26-35:
26 For this cause God gave them up unto vile affections: for even their women changed the natural use into that which is against nature.
27 And likewise also the men, leaving the natural use of the woman, burned in their lust one toward another, men with men, working that which is unseemly, and receiving in themselves that recompense for their error which was meet.
28 And even as they did not like to retain God in their knowledge, God gave them over to a reprobate mind to do those things which are not fitting,
29 being filled with all unrighteousness, fornication, wickedness, covetousness, maliciousness, full of envy, murder, strife, deceit, malignity. They are whisperers,
30 backbiters, haters of God, spiteful, proud, boasters, inventors of evil things, disobedient to parents,
31 without understanding, covenantbreakers, without natural affections, implacable, unmerciful.
32 And knowing the judgment of God, that those who commit such things are worthy of death, they not only do the same, but have pleasure in those who do them.
Additionally, there are hundreds of other Bible passages on this and other subjects which would ignite their anger. If it isn't this subject, it's another. Most people don't like having to face their sin, nor do many take kindly to the remedy.
It is easier to condemn the messenger than accept the message.