It’s not hard to entertain truth. It really isn’t. If the gay vespers are to pray for those who struggle with SSA, and for the should of our brethren who partake in “LGBTQRSTUVQXYZ” activity, for their conversion? Well, what a charism this is. To pray for sinners, to pray for those Catholic who have been blessed with such a cross, for Catholics who struggle every day with being in love with that which they know returns not a favour. This is a cross, not a compulsion. If these Vespers are prayed for those struggling souls, these faithful men and women neglected by the popular person, then an infinite of good will come.
But if the Vespers are an alternative for active sodomites who practise that and feel uncomfortable at Mass, then they ought to feel just as uncomfortable at Vespers. It is the Church’s public liturgical prayer.
The active homosexual might feel uncomfortable, though if he or she comes in earnest understanding and faith then they are to be welcomed and they ARE home.
The SINNER is HOME in the Church not because we accept their sin, no, because we are THEIR family and we are charged to LOVE them like parents and reflect the love of God. We are to love our neighbour as ourself so why will we stand by and pray for their continuance in sin through prayer? Why are we to stand aside and act as if their world cannot be impacted by the faith of God’s only Church. Why do we accept the active fault of mankind?
As Catholics we are to bear witness to the truth. Any parish offering Vespers for the LGBT cause is to be avoided. Any parish which offers Vespers for the LGBT people, who earnestly seek the faith and truth, is to be applauded because the results will be God glorifying for He himself knows His children and their hearts.
However: it is hard to accept truth. To realise truth. @R_H_Benson is on the right tract here. Even from traditionalists there is no cold shoulder towards those who are gay, who struggle with labels and with the nature of their sexuality. As children of God, as members of His Church, we are obligated to show them the way, the truth, the life. We are to bring them to our Blessed Mother.
If the LGBTQ Vespers excludes all that; avoid.