Hetero vs. Homo a viewpoint

Every species that God intended to endure has a means of procreation. They do not. So by opposing them you are forcing them to dance about and wave smoke and mirrors and shout a lot. That's all they can do. They can never accept this logic because it signals the end of days for their kind. They cannot accept that and stay sane so they band together in support of each other and protest. They are hoping that enough normal people will exhibit enough kindness that they will be allowed to strut a few remaining seconds on the stage of life before the inevitable end. Whether they blame God, Nature, or Mankind, matters little. The weak and deadend forms of life perish. It is the one law Congress cannot change.
Consider that "Survival of the Fittest" does not always mean the strongest, the most clever, the loudest, or the most numerous.  It usually means the one that endures. Procreation is the cornerstone of endurance. Even having it is no guarantee.  Dinosaurs are an example.  But without it nothing else matters.