Attacks are "bulls--t," mogul claims
Ken Ziffren says film industry is trapped in a "bad spiral"
The veteran entertainment attorney, introduced by L.A. Mayor Eric Garcetti, says the fight is at "critical moment"
Garcetti named Sherak the city's first film czar after being elected last year
Hollywood's powerhouse lawyer backs the deal with DirectTV in an article in THR, but never mentions that the satellite company was his client