From what I've gathered, it seems like what happened, speaking from a relatively neutral standpoint, went as follows:
-Apollo added more races to the Civil War Overhaul mod, as part of something I've heard referred to as "Diversity Day".
-This started an argument over at the Nexus about whether or not this was lore-friendly, along with accusations of racism/being overly politically correct from both sides. Arguments got heated.
-In response partly to this, and partly to the election, Apollo hid his mods, replacing them with
this page, stating that they would be back November 9th.
-On November 9th, as he said, the mods came back. Five days later, they were gone again. We have no word from him...pretty much at all. No reasoning given (though it can be assumed it stemmed from the previous arguments), no idea if they'll be put back on the nexus, or on a different site, or put onto a flashdrive and hidden in the middle of the woods. For all we know, he was sitting at his computer, had a heart attack, and his head hit the DELETE ALL MODS button on his keyboard on the way down. He pretty much just vanished.