Yes. What Jndas says is very true. I have been living in South India for the past 15 years since my introduction to ISKCON. If someone doesnt believe in the GURU the temple authorities follow, that person will be gradually eliminated. They authorities never say it openly. But by behavioral actions the message is communicated to the person.
Why so much? Even if a follower/disciple of Guru X comes to a temple or happpens to live in a temple where the temple authorities follow Guru Y, (both Guru X and Guru Y are most respected in ISKCON), the Guru Y followers try to give the same message to the follower of Guru X. This follower/disciple will not be given independence to preach or cultivate the congregation. Guess what the fear is? The temple authorities believe, "If this guy is allowed to preach and cultivate, he will get all his cultivates to believe in his Guru rather than our Guru. If it happens then we can't control the devotees according to our whims!"
Very True. If someone doesnt believe in Radhanatha Maharaja as a pure devotee or doesnt want to take RNS as guru, and if his intentions are known to the followers of RNS, do you think they will allow this person and encourage him in thier Chowpatty temple?
"I wish that each and every Branch shall keep their independent identity and cooperate keeping the Acarya in the centre. On this principle we can open any number of Branches all over the world. The Ramakrishna mission works on this principle and thus as organization they have done wonderfully." - Srila Prabhupada's letter to Kirtanananda, February 11, 1967
ISKCON is still far far away from this concept desired by Srila Prabhupada. The GBC may proclaim that they follow Prabhupada. But the reality is different. If one gets to the grass roots in ISKCON (South India), this pulse can be easily felt.