Treating each other as enemy and talking bad about vajra brothers and sisters causes the heaviest, bad karma in Tibetan Vajrayana. It is considered breaking one of the samayas.

• 切勿批评。挑剔或讲金刚兄弟的过失并待他们如仇敌。这是被归类为金刚乘最大的恶业及坏了三昧耶戒。