First, Christians need to stand up, and not be associated with other so called “Christians” who either tolerate or advocate sexual immorality.
This means RESIGNING from and leaving Churches in the mainline denominations: [Episcopalian: TEC, Presbyterian: PCUSA, Lutheran: ELCA, Churches of Christ: UCC, Methodist: UMC, ETC.]
EVERY one of those groups either openly endorses sexual perversion, or tolerates churches and shepherds which do.
There are smaller, biblically faithful versions of each of the above denominational traditions. No, the buildings won’t be as big, or nice....and they won’t have as much money...but better to meet in a cave, than to cave on faithfulness to God & His Word.
If you are a part of a denomination or church which can’t seem to bring church discipline against sexual perverts, than that organization has ceased to be a church at all; you have a responsibility to testify against them by separating.
Many modern churches tolerate a wide variety of sin: divorce, fornication, etc. I don’t know how they can condemn homosexuality when they look the other way when they allow unmarried heterosexual couples who are living together to be members.
Divorce is another serious issue that many modern churches seem to accept without reservation. God hates divorce (Malachi 2:16). Remarriage after divorcing is adultery (Mark 1:1-12). Yet, I see churches all the time claim divorce is OK if it’s a “bad” marriage.
It’s a rare church in this day and age that truly opposes sexual immorality, but I agree with what you wrote. We aren’t even supposed to eat with professing Christians who preach heresy. They are worse than unbelievers, because a Christian represents Christ. If that salt loses it’s saltiness, what hope do sinners have that go to those churches seeking redemption?