Follow that encouragement from Hebrews. There is no “fellowship” around error. For any church to equivocate on a no-brainer such as “a man shall leave his father and mother and be united to his wife, and the two shall become one flesh” is inexcusable. Disqualifying.
God loves and cares for the freaks, vagabonds and sexual misfits but NEVER condones their sin. Look at all the wolves in their WE’RE NICER THAN GOD sheep’s clothing, patting the lost on the back and driving them further into error just so they can get a self-righteous high.
I really agree with your last paragraph. They suffer under a delusion.