A SCOTUS ruling against gay marriage would be devastating for the GOP

I was thinking about this and if SCOTUS would rule againt gay marriage a LOT of states would this right. With opinion polls favoring SSM in many places there would be a considerable outcry and would give the democratic party a huge boost of support from progressives and younger people. The GOP, again, would look like the bigot party since it is republican appointed judges that caused this.This could contribute to a Republican loss in 2016.On the other hand if SCOTUS rules in favor of SSM then the GOP loses very little. The republican voters cannot blame the party since it was legalized by courts. Democrats will lose a point on their platform that differentiates them from the GOP, and therefore progressives and young people will have little reason to go vote for democrats.This is my two cent analysis. Any suggestions of what I may have missed or overlooked ?