Nowadays there's so many bogus gurus. These self-professed 'saints' are only interested in making followers and collecting money. But a true sad-guru is indeed very rare. He honours all, be it a dog or an ant. Such a bona-fide guru is never afraid to carry out the instructions of his gurudeva and the entire guru-parampara as it is.
Bogus gurus may try to stop their charge from hearing harikatha from a bona-fide personality, but a true bona-fide guru is never shaken and will rise high despite the so-called tidal wave or obstacles thrown in front of him. For he is truly a saint and has fully controlled Krsna with divine love. He is an uttama-bhagavata, a topmost devotee of the Lord.
tad viddhi pranipatena
upadeksyanti te jnanam
"Just try to learn the truth by approaching a spiritual master. Inquire from him submissively and render service unto him. The self-realized soul can impart knowledge unto you because he has seen the truth."