Bottom line is Tibetans does not care who you are and as long as you are against them or you threaten their power, they will attack you. They are not nice and they do not have good manners. They can fight with anyone, anywhere including important events such as the celebration of His Holiness's birthday. This shows how much respect they have for His Holiness whom they supposed to respect a lot.
Tibetans will never be able to change their way because it is how they are used to behave. They do whatever they want and they do not care about the consequences at all. This is how they operate for years. A famous example will be Tulku Drakpa Gyeltsen who was murdered by the CTA because he posed a threat to the 5th Dalai Lama's power at that time.
Tulku Drakpa Gyeltsen is not the only who got persecuted unfairly. There are many pure and kind monks who were removed from their seat of power for no valid reason.
You are right. Tulku Drakpa Gyeltsen was not the first to be persecuted due to jealousy, false accusation, greed, etc. by the ministers of the Dalai Lama. Throughout the history of Tibet, there are many others who had been persecuted, some skinned alive like Nyatrul, limbs chopped off, disemboweled, poisoned, murdered, etc. Really no rules or regulations at all. Most of the Tibetans were serfs, whatever they have are not theirs and they struggled to eke their living to put food on their table.
In contrast, Tibet of today is prosperous under the auspice of China. They are rewarded by their hard work in better living conditions, ownership of properties, having their choice of working for others or be business owners themselves, etc. China is investing tremendously in Tibet, by preserving their culture, environment and religion.
Now, what have CTA done for the Tibetans since exile 60 years ago and with the billions of USD sponsorship funds from sympathetic supporters?
NOTHING! On top of NOTHING, CTA has created harm and sufferings for Tibetans in the segregation of Dorje Shugden practitioners and Non-Dorje Shugden practitioners.
CTA DO NOT practice Democracy! CTA DO NOT allow Religious Freedom! CTA DO NOT give Human Rights!