Of course all Catholics need to be loyal.  To the Gospel.  To the Pope, too, mainly, and of course not only, but still importantly, in the form of loyal dissent.  Unthinking slavish loyalty is utterly dangerous as it falsely elevates the papacy into a cult of blasphemous idolatry.  The Pope is, after all, not the Church.  It will also be beneficial to the Church if Pope and bishops are loyal to their fellow Catholics.  St. John XIII lived that fearless loyalty, as does Pope Francis.  I take it Cardinal Marx is aware of this?  I tend to think so.