Aside from all the politics the reality is simply this; homosexual conduct and gay marriage are simply abnormal and unnatural. Now, the courts may determine that so called "gays" have a legal right to marry but if so such ruling does not legitimize their conduct from a moral or ethical perspective nor does it convert their actions to "normal" or "natural".
What gays really want is not only legal legitimization but also cultural, societal and religious acceptance and they know that in order obtain such they first must gain legal recognition. And, they will attack and demonize anyone that stands in their way by labeling them as bigots, homophobes, etc. In other words; they will vilify their critics and try to make THEM the immoral.