What is the source of the citation?
They speak about a guru but that's in the usual tone of all the hindu scriptures. Also many times the word Guru references a spiritual entity (a deity) not exactly a living person who collects money and exploits devotees. Moreover, the analog of guru in Japanese tradition is sensei, but I hope that does not imply that martial arts are dangerous and if
Forum:
Coercive Persuasion and Undue Influence