Furman v. Georgia encroaches upon the authority of the jury. It exemplifies one of my points, that allowing USSC bad behavior guarantees future bad behavior.
Prior bad acts do not justify other bad acts.
The purpose was not to debate the wisdom of those decisions, and certainly not to defend the Obergfell decision, but to show to ResponseAbility that the court can, and frequently does, require states to abide by their rulings.