Sorry Joe, but although I respect your views which reflect your basically good nature and optimistic faith, I would point out that homosexual "marriage" has completely re-written the rule book regarding monogamy within marriage, due to the lack of the stabilising factor of family structure.
This is what lies behind the Catholic Church's opposition to the subject and also the incongruity of continuing to employ homosexuals in the priesthood.

Rather than go through the whole scenario again, here is an excellent view on the issue, which advances many points of view.
"Gay Marriage"