You're writing a whole lot to try and convince yourself to feel better about not having turned out to stop this.
I'm glad someone else can see through this shit.
Trump was on 60 minutes shortly after he became president-elect. He was asked point blank if he would repeal gay marriage.
His response was that the issue had already been settled by the supreme court and that there was no reason to revisit it.
Plenty of youtube clips, and articles on the internet covered the interview.
If you think he was lying, or that the republican party will do something to revoke gay rights behind his back. It's perfectly fine for you to say so.
But this isn't an instance of "fake news."
Trump's view on it is irrelevant. He won't be on the court making the rulings. If his SCOTUS pick decides to overturn marriage equality, there's nothing Trump can or will do about it.