Pray for wisdom on this matter. If I enter a store to buy a package of batteries and the clerk appears effeminate, I'll probably buy the batteries. When it was discovered that the two ladies who took school pictures every October were a "couple, " the school found another photographer. No, nothing ever "happened," but why take a chance? One does not become guilty of the sins of others with whom they have casual dealings in the course of ordinary life. It is only when those dealings appear to condone sin or when they are a source of temptation that a break must be made. God does not expect or even desire us to perform an in-depth inquiry on everyone. In His mercy, we are free from sin even if we receive Holy Communion at the hands of a priest in mortal sin. The Sacrament is efficacious for the Communicant of pure heart, but sacrilege for the priest.
As for a Jew, Protestant, Muslim sitting idly by as children go to the novus ordo, most would have no problem because they believe in religious liberty. "The child has his religion; I have mine. Isn't it nice we can all co-exist and be friends?"