I try to remind followers of Christ that “unity” and candy corns and unicorns are not a gauge of Christlikeness. The Tower of Babel was built by a unified people!
When it comes to the church and same sex partnerships the church need only respond with the truth that “natural” male to male sex produces disease. STOP right there and go no further until the person comes to grips with the reality of that truth! Even the Centers for Disease Control of the Federal government backs up this truth.
Truth sounds like hate to those who hate truth!
Same sex partnerships are an abomination and rebellion against God. Hold the line with these truths.
How about sins of pride?
Christian missionaries often are sent on paths that incur diseases. That alone does not define sin.