LOL!
Alright, lurking DUmmies, a couple points:
1. The evil Right Wing Conspiracy or whatever would have nothing to gain by shutting down DU. You really think they care about a bunch of losers on an Internet forum spouting insults and conspiracy theories about them? If that were the case, they'd have permanently shut you down back during the Bush administration.
2. As Fiddy notes, it was almost undoubtedly Skinner who shut down the site. As the night went on and it became increasingly obvious that Trump was going to win, Skinner knew that the board would be flooded with innumerable threads and posts from DUmmies flat- out demanding Trump's assassination, and didn't want to potentially get himself in trouble with the Secret Service because of that. So, he shut the site down long enough for the DUmmies to become less rabid and demented, and made up the claim that they'd been hacked.
3. Nobody "Squashed" the DUmmies' right to Freedom of Speech; They still had the right to say whatever they wanted, they just couldn't do so on that particular site for a while.