Regarding your questions, in the sense that they do not belong to disciplic succession, in that sense Christ, Buddha, and the others are not bona fide. But because they have got some special power we accept them as bona fide. Just like Buddha. We accept him as the Supreme Personality of Godhead. Sometimes they play like that because they may have to. Although they are bona fide, they play sometimes as unbona fide. For example, we reject Buddha as unbona fide, but we accept him as an incarnation of God. We worship Lord Siva as a Vaisnava, but as a demigod we reject him.
Letter to Nityananda das, 16 August, 1972