Scripture teaches that God is Love, not Love is God. The love of God is not disordered. Homosexual love is disordered, and therefore not of God. You show yourself to either not to be a sincere Christian, or someone who is ignorant of their faith. In what you are proposing here is that God and union with Him is not the greatest good, but a person’s supposed happiness, pursuit of one’s own pleasures and gratification, which is not Christianity at all, but hedonistic paganism. As far as rights are concerned, marriage is a sacrament, not a right, a blessing and a vocation from God, not something to twist and distort so as to attempt to justify people’s perversions and disordered passions. Pursuit of homosexual activity is the epitome of selfishness. We are all called to chastity and holiness, regardless of our attractions. Every single human being is born with all the inclinations for all the sins, some to a greater degree than others in this area or that. We do people no favors by lying to them and telling them that their behavior is ok. God sets before all of us a blessing and a curse, if people with same sex attractions would see their lot in life as a blessing, a call to holy celibacy and a deeper union with God, then they would find blessing in the midst of their trials and tribulations. But if they give themselves over to their unrly passions, and this is true for all of humanity whatever our passions are, then they will experience and inherit a curse, specifically, damnation.
You see, in order for a Christian to support a lie such as promoting same-sex unions, one has to distort the truth they have received. And once that lie has been exposed, they have to twist an even more fundamental truth in order to continue to hold their erroneous position. And if they have not humbled themselves and confessed their error and change, then they must continue to further twist and distort any truth in them as the deepening lies continue to become exposed, as happens with all lies eventually. After some time at this twisting game, the person him or herself has become so disfigured morally, their moral compass completely “demagnitized” from the direct rebellion against True North, God’s teaching. It is like a candle wick, with each lie to cover the previous lie the person, the wick, becomes more and more twisted until they find themselved thoroughly wicked, “wick’d”. And if they have continued long enough in this dangerous game of theological contortions, the person is left permanently impenitent, no longer capable of repentence, the sin known as blasphemy against the Holy Spirit. As Father John Hardon once lectured, where there is active homosexuality and those who defend it, there always follows heresy. And this is why, because the person has made themselves an enemy of the truth and their pride keeps them in error, as all sin darkens the intellect and blinds us to God’s will, because sin separates us from God, and repentence brings us back to the loving arms of a Savior who wants us, all of us, those with same sex attractions and those with heterosexual attractions, everyone, to spend eternity with Him.