That is Vaishnava aparadh

Pusta Krishna Dasa : In Australia there were some ISKCON devotees who were displeased with Siddhasvarupananda Maharaj's successful preaching in Hawaii. They noted how not all his followers were coming to Srila Prabhupada, although they used Srila Prabhupada's books and chanted the holy names. When I mentioned this to Srila Prabhupada, he raised his eyebrows and said, "That is Vaishnava aparadh," meaning it was Vaishnava aparadh against Siddhasvarupananda Maharaj. With all humility, Prabhupada said that there were many branches of the tree of Lord Chaitanya Mahaprabhu, that ISKCON was not the only branch. He said that we need to develop tolerance for the other branches of Mahaprabhu's tree.