This is an example of how the Dalai Lama's policies result in misinterpretation of dharma.
Some people, who have no idea about Dorje Shugden will believe anything; a lot of them also suffer from a general lack of logic. So, when they are taught that we are non-virtuous for chanting prayers, then they feel that by helping us to chant, that they commit a non-virtuous act. They mistakenly think that the act is non-virtuous is only the first problem. Even if someone is engaged in non-virtue, we as Buddhists do not cause them to starve; the idea that they will keep us from the lower realms by ending our practice, and that anything is jusfified to end our practice is the problem. So feeding people who go against HHDL's wishes is considered non-virtuous. So, helping end the practice, even by any means, is considered virtuous, by some confused people. Even when people are in war, we do not need to harm them to stop the war; we can talk to them to stop the war and discourage the war.
The main problem is that people are afraid to go against what the Dalai Lama says; even when the Kagyupas wanted to pick their own leader, as they have always done in the past, there are some that are angry with Shamar Rinpoche's Kagyus for supporting the right of the lineage holder to find Karmapa. In Delhi, years ago, I was nearly spit on by people loyal to the Dalai Lama; I had not yet even heard of the Shugden practice, but was studying with the Kagyupas; since they always asked 'who is your lama' then it's kind of hard for them not to know who your with.... so if any of us say that we support the rights of Buddhists to choose their own lamas in their traditional way, say their own prayers etc., then the really fanatical among the Dalai Lama crowd get very confused and say we are bad for opposing his holiness. they sometimes feel any action is justified against us, to keep us with the Dalai Lama's wishes.
I am sorry, but when I look at the Tibetans that would do violence to support their lama, I feel sad. For instance, there are pictures in on the western Shugden Society website of Tibetans who were willing to go to war for the Dalai Lama. I think, would I go to war for Karmapa? I know in my heart Karmapa would never want us to harm even a mosquito, let alone someone with a human rebirth. The same is true for all the teachers I have ever taken, and dharma protectors as well; they love all living beings. How impossible to harm living beings to please or help any Buddha.