According to Nyingma and Kagyu own standards, as applied to Dorje Shugden, their protector Vajrasadhu is a sectarian protector, and therefore they are sectarian themselves.
In other words, such Nyingmapas and Kagyupas maliciously accuse others, such as Gelugpas and Shugdenpas, of their own sectarianism, in a dirty attempt to cover it.
And why are such Nyingmapas and Kagyupas so sectarianist, and so immoral? Because their motivation is purely political, and they see Gelugpas as an obstacle to their political aims.