This is the first time i heard something like this in a Buddhist society but I'm not surprise. Due to the degeneration time, more and more degeneration actions will appear, even under the Monastic system, it will be harder and harder for one to hold a pure Dharma lineage. As our bad karma accumulate days by day, and we have heavily influence by the information from all around the world, it's very easy for us to choose the wrong path.
This is why for a degeneration like now, we need a very powerful Dharma protector to protect us from all source of negative influence. Our mind in degeneration time is like a candles in the wind, it flickering all the time. If we have no strong faith in our lama/dharma, we could easily effected by the samsara.
Dorje Shugden swore to protect the Dharma during the degenerate time, which it is now. It's very important for us to engage in a dharma protector practice, which can keep our mind clearer on situation and it actually stop us from doing bad things and collected more negative karma.
The situation of degeneration will not become better as prophesied by the Buddha himself, but engage in a Dharma protector will prolong the period, which allow us to collect more positive karma/merits.