Is Klopp's belief system promoting the most abominable heresy?

The great hurling writer Kevin Cashman was not a believer in unbelievable belief. Around the turn of the millennium, Cashman wrote in The Sunday Independent:
"Nowadays, every other sentence we hear from coaches, especially concerning forwards, is about the imperative of 'getting them to believe in themselves'. If that is what Nicholas English and Jimmy Barry Murphy are trying to do, they are promoting the most abominable heresy, and interviews with Senor Torquemada are called for.