What makes you think it's libel?
What makes you think it's not?
The people involved. They are odd, secretive, and nasty. There have been rumors of the Clintons being involved with all manner of nasty sex stuff for a long time. Smoke meets fire.
Is that where we've gotten to? It's no longer incumbent on those making a wild-ass accusation of "satanic pedophile" to provide some verifiable facts, it's up to others to prove the accusations false?
No, this is very likely where they have gotten to. Power corrupts.