After 60 years in exile, CTA is no closer to even gaining a foot hold back into Tibet. Living the life of "Refugee" status had been very, very comfortable (even lucrative) to CTA and their cronies. Being victims and making the Dalai Lama a victim is their profession now. Of course they can't be seen as failures to their people or they may lose their "votes" so they place a ban on Dorje Shugden practice.
Firstly, with one stroke of banning Dorje Shugden as a 'devil' practice, they effectively eliminated dominant high Lamas that may threaten the Dalai Lama's rule, within the Gelug tradition. These high Lamas were making headways into the world and gaining popularity with many students and supporters. And they are not likely to give up Dorje Shugden practices due to their pure Guru Devotion and samaya with their Guru.
Secondly, since CTA failed with the Tibetan cause, they needed to be seen "successful" with something and so the ban on Dorje Shugden to boost their delusional ego. The Tibetans-in-exile coming from a feudal system where the Dalai Lama is highly revered and now in India, as the de-facto "King"/Religious Leader, most placed their hopes on him to bring them back to Tibet. So CTA used the reverence of the Dalai Lama to garner support for themselves against the Shugden practitioners, deflecting the attention away from the Tibetan cause. I think the ban itself may not be as effective but when CTA purposefully linked Dorje Shugden with China then it garnered the attention they wanted. Its amazing how low CTA would go to secure their power, by pitting their own people against each other, by bringing sufferings onto the Shugden Lamas, monks and practitioners and by intentionally inciting the creation of negative karma.
It is heartening to watch the video as Tibetans Shugden practitioners bravely stand up to voice out against the lies of CTA. May the world swiftly realise the pain and sufferings that the Shugden practitioners, especially Tibetans, had to go through. I admire how they endured such sufferings due to their strong spirituality and devotion to their Guru. On the other hand, it was the Dalai Lama's followers who stood out to be vulgar, abusive and totally opposite of the Dalai Lama's teachings of kindness, tolerance and compassion. Om Benza Wiki Bitana Soha, may compassionate Dorje Shugden lift their veil of ignorance and delusion.