What the nuns did to the Dorje Shugden statue was appalling! Even if Dorje Shugden was an evil spirit the should not have acted in this unBuddhist way. Nuns and monks should be evoking an energy of kindness and compassion. Even if they wanted to stop the practice and be politically correct they should at least put the statues away in a dignified manner. Dignified here means they should have acted with more dignity.
It is really their own reputation tht they are tarnishing and the karma if Dorje Shugden was a Buddha, the karmic repercussion would have been greatly a negative one. In relation to the 18 Root Bodhisattva Vow, I believe they would have transgressed the following... and especially no.8 Committing the five heinous crimes which is similar to wounding a Buddha/drawing blood from a Buddha...
8. Committing the five heinous crimes. ("Kings vow") The five heinous karmas are killing one's father, killing one's mother, killing a Foe Destroyer (Arhat), wounding a Buddha and creating a schism in the Sangha. Doing any of these very heavy negative actions will break this root vow.
9. Holding wrong views. Wrong views are such as denying the existence of the Three Jewels, the law of cause and effect, the conventional and ultimate truths, the Four noble truths, the 12 links of dependent origination and so on. Holding such wrong views will break this root vow because you will be unable even to benefit yourself, let alone others. For example, by denying karma you will not be concerned about the consequences of your actions and, with such carelessness, will continue to create negative karma and hurt others.
10. Destroying towns and so on. ("Kings vow") If you completely destroy any place inhabited by living beings, you will break this root vow. Destroying a city or country habitat, whether by means of fire, bombs, black magic or any other means, will kill many living beings.
I can't seem to find exactly what are the repercussions for such an act... does anyone know?