There is nothing sane, merciful, heroic, devout, redemptive, wise, holy, loving, peaceful, joyous, righteous, gracious, remotely spiritual, or worthy of praise where mass murder is concerned. We have been in this world long enough to know that by now and to understand that nonviolent conflict resolution informed by mutual compassion is the far better option.
The Catholic Church standing in "solidarity" with members of the LGBT community while condemning their behavior as "sinful" is a little like attempting to stand with two feet in one shoe. "Love the sinner, hate the sin" sounds really high-minded until you realize the only sin committed was being born different.
Terror doesn't change people from gay to straight. It just hurts innocent people.
When has a civilian ever stopped a mass shooting with an AR-15? An AR-15 is a perfect weapon for mass murderers -- not so much for self-defense. Would you bring an AR-15 along on a date? To your place of work? To the movies? If not, how can owning an AR-15 save your life in the event of a mass shooting? Why does the NRA keep telling us we need semi-automatic rifles for self-defense? Whose side are they really on?