I guess if you think a gay couple flying a pride flag is confrontational or rude, we have significantly different opinions to the extent that we can't come to any consensus on this or similar issues.

I'm also doubtful that the gay couple truly hasn't broken any laws. I'm sure that with enough digging, the homophobic neighbors can find a fence on the wrong side of the property line, a deck that isn't zoned properly, or something similar; the neighbors could even pass a HOA regulation prohibiting pride flags. Does that make it morally justified, because it's "their" homophobic town? It seems like you think so.