That's the typical cult leader way of seeing the world: himself in the role of the guru who is beyond reproach, being unjustly persecuted by ignorant outsiders.
According to a post on his Facebook page dated February 16, 2019, it had something to do with students who were filmed for a video:
"Now, having left this teacher and the community, several of these students are unhappy to see these earlier interviews included in the newly released video. They have since voiced their discontent both in comments under the YouTube video as well as on their own social media pages stating that they are no longer a student of this teacher, and have also urged others not to be drawn in to this teacher's work and this community."
I assume that the video in question is the one titled "Entering the Heart -- Documentary Film" on his YouTube channel, uploaded on December 1, 2017. I don't see any comments underneath it that could be relevant. Perhaps Igor Kufayev deleted them.