As a Bible-believing fundamentalist separatist, I believe that the Bible tells us to walk away, separate ourselves from the world, which means unrepentant sinners. I can bring the Gospel to them without socialising with them or endorsing, or tacitly endorsing, their sin.
The problem there is that I see with around 80% unsaved in the population and all the sinning they do, I end up working with them (i.e., the unsaved sinners, involved in politics with them, going to school with them, being neighbors with them and just about everything we do in society.
In regards to the Homosexuals, I don’t run into many of them, as they are about 3.8% of the population. It’s the 80% of the population who are the unsaved sinners that I can’t get away from ... :-) ...