It is sad to see that the police needed to be rough towards the Tibetans who are pro-Dalai Lama. It can cause bruises and can be painful. As Buddhist, we don't want to see anyone suffer. However, the police need to resort to force not because the police are against pro-Dalai Lama, but because the pro-Dalai Lama Tibetans are rather violent. Look at the way they wanted to go to the other side, and throwing items, it is clear to see that they want to provoke the Dorje Shugden practitioners.
To me, it is quite clear that the pro-Dalai Lama Tibetans do not understand the meaning of protests. Protests or demonstrations are basic human rights in the western countries, and it is a way of expression to voice what you stand for. At times, I really pity the pro-Dalai Lama Tibetans because I am quite sure they don't understand the meaning of protests, and they are being manipulated to be violent towards someone who have a different view from you. Do they really expect EVERYONE in the world to love HH Dalai Lama? As a public figure, there will be people who like Him, and of course there will be people who do not like Him. For people who do not like Him, don't they have rights to show their dissatisfaction?
I must say CTA has done a good job in making their people uneducated and naive so that the people can be manipulated easily. I do pray the new generation of Tibetans can think on their own and act based on logic.