Edit for formatting
Summary - The Normalization of marriage rights for gay people is going to completely undo a lot of feminist bullshit.
In Before "don't get married"
For those that are, or want to be you should be cheering the hell out of the normalization of marriage rights for gay people because it is going to (in time) completely cut the legs off of women's ability to fuck men over in divorce and custody battles.
In the western world for the last couple of thousand years, marriage has been strictly between men and women, and was a means of ensuring that women could obtain resources from men, in return for comfort, security, safety and the continuation of the male bloodline. If women broke the contract by fucking around, or being an awful wife then she was punished in the courts by having all the contractually obligated goodies taken away in divorce. Thanks to feminism, people often forget that men were also punished for being "bad husbands" by the community if they neglected the health and well being of their wife and kids by failing to look after them.
Cuckolding aside, this bargain held pretty much true until feminism came along and completely fucked things up by implementing horrible things like "no fault divorce", which took all the punishments for breaking the divorce contract for women but not for men, and "the tender years doctrine" which gave automatic child custody to the women, regardless of her ability to look after the children, and then made men pay for it.
That has been the reality for the last 100 years or so but now with the normalization of marriage rights for gay people in the US, it means that the Man / Woman dynamic of marriage, divorce and custody battles has been blown completely out of the water.
Now it's going to be two PEOPLE, in a dispute which means things like "The tender years doctrine" will be rendered completely moot within 10-20 years. After all, you can't automatically award the kid to the mother, if there is no legal mother, or there is two of them. I also predict we'll start seeing "Fault" creeping back into divorce law, now that you won't be able to automatically "Blame the man" for the marriage falling apart.
You are going to see radical changes to divorce and marriage laws because all the sexist feminist bullshit that has been written into the mountains of law, will suddenly come back to bite a lot of (especially lesbian ) couples in the arse.
Not only that, now it means that gay men will no longer require "beards" AKA women they marry for legal and tax reasons. It'll be hilarious to see Chairmain Pao getting divorced now that her gay husband doesn't need her as a beard anymore. I am sure there are going to be more than a few men gaming the system and getting "married" as a form of tax / legal protection.
So as a RP guy, I am cheering on normalization of legal rights, because the more it happens, the shittier life will get for feminists and SJW's and the crazier people will realize they are. We get to sit back with a big bucket of popcorn and watch the SJW's eat each other like rats, as the blame game begins.
RP lessons - Any argument predicated on "the suffering of men" will always fail, because society doesn't give a fuck. Arguments based on logic and law will eventually win out against feelings. Also SJW's and feminists are incredibly short sighted, and even when they think they have won they have fucked themselves.