It is less than unfortunate that many bring up the strawman of discrimination with regard to the UMC debacle and related/similar situations. The fundamental disagreement here that cannot be dismissed is whether sexual behavior/relations outside of heterosexual marriage constitute sin. LGBTQA+ behavior (practicing, condoning, etc.) is nothing other than giving in to desires of the flesh – the carnal nature.
The reason this is so critical/crucial is that the Bible calls Christians to not even associate with someone who claims the name of Christ but refuses to repent of their sin. Rather, Christians are to exclude/remove them from any fellowship/gathering. (1 Corinthians 5:11-13). Being obedient to that teaching completely precludes any facade of unity that a church/denomination could claim or aspire to around the inclusion of those who are unrepentant of any sin.
This also emphasizes the absolute need for any faithful church to not ignore sin within/among its members but to continually call for confession and repentance leading to restoration and reconciliation.
Many churches are setting themselves up to have their lampstand removed (Revelation 2:4-5) by the Lord for these practices of tolerance and inclusion – those practices are nothing other than the fruit of those who have lost their first love. You cannot love God and at the same time love the world and its pleasures (1 John 2:15-17).
Christianity is exclusive! All are welcome to come as they are (John 3:16-21; 2 Peter 3:9). None are welcome to stay as they are.