P&T: BS is a great show, but like all episodes, this one obviously deals in exaggerations and caricatures rather than concrete facts. That being said, there is a lot to criticize about feudal Tibet before Chinese rule; how much the Dalai Lama had to do with that, however, is up for debate.
It's a contentious issue with multiple sides, so feel free to laugh at their sacred cow-slaying but don't take it too seriously.
Gain and loss, status and disgrace,
censure and praise, pleasure and pain:
these conditions among human beings are inconstant,
impermanent, subject to change.
Knowing this, the wise person, mindful,
ponders these changing conditions.
Desirable things don’t charm the mind,
undesirable ones bring no resistance.
His welcoming and rebelling are scattered,
gone to their end,
do not exist.
- Lokavipatti Sutta