I think there are numerous things going on here and most of them have analogies in the USA.
#1. Some (certainly not all) people who are primarily familiar with one culture make naïve mistakes when evaluating systems in another culture. They just don't know enough, or blind themselves to obvious issues. My mind goes back to various American liberals who supported the USSR back in their heyday. They saw the USSR as they wanted to see them, not as who they really were.
#2. Perhaps the biggest one, a lot of folk are all about "the enemy of my enemy is my friend." Just look at Modi. American Evangelicals HATED that man as recently as 10 years ago. His party openly hates on Christians and is the face of anti-Christian persecution in India. But as hating Muslims became more and more important to the Republican party, the right chose to overlook Modi's deficiencies because the shared hatred of Muslims was more important than anything else.
#3. Falun Gong is a conspiracy-filled, mind-bogglingly irrational cult. Being shocked that their political choices aren't principled is like being shocked that "moral" White Evangelicals supported an immoral man like Trump.