When changing marriage from a state-granted privelege into a right, presuming that happens this year, the US Supreme Court may not play favorites. All consenting adults will thereafter have access to "anything goes" marriage if that is based on abandoning tradition (man/woman & "two only"). Opponents to this union between father and daughter will only have the argument "it's creepy" to fall back on. But a man using another man's anus as an artificial vagina is also very creepy, so, there you go.
Game over. Remove powers from the states to regulate and this is what Lady Justice with the blindfold on and the scales will dispense as "justice in the name of equality"...if marriage becomes a right to lifestyles in addition to race.
Well, I agree... if such a decision comes along, we will then be informed that the powers that be have determined that the US Ship is to be scuttled.
There will be no alternative conclusion possible, in that such will tell us that what amounts to the cultural conscience has completely lost any means to make sense of the rapidly devolving circumstances and that they feel that it is better to burn this ***** down, than to watch it rot.