Like always, when the cat's away, the rats will play.
They heard he was going to have others sit in for him on his program all week, so they think they can say what they like and he won't be able to respond right away.
Those extremists (on the left and on the right) pulled the same thing when he was off for a month. Their not-so-subtle threats were the same as they are now -- "He had better back off and show some humility and compassion now, or else."
But when he got back, he said, "I have just one message for you liberals out there; the game is over - I'M BAAAAAACK!!!"
Of course that "messaage" also includes the libertines, since they are merely the flip side of the same extremist coin.
America's Framers were true libertarians. They knew that laws are only for the lawless. Law-abiders who restrain themselves, need no external restraint. Unless citizens exersize self-control, freedom is impossible.
A libertine / liberal is really a relativist who only wants to restrain/control himself from doing what is wrong in his own eyes.
Unlike America's Framers, a libertine cares nothing for an absolute standard: "the rule of law".