Yes, I believe the death toll in Hong Kong during the recent protests is certainly more than the number I have given in this post.

Difference

Hong Kong people have lived for a long time in the separation of powers and universal suffrage system. This is completely different from Vietnamese and mainland Chinese, so Hong Kong people will try to protect and preserve it and most Vietnamese and mainland Chinese don't think about it.

Dangers

I think people who join the crowd are often unaware of the dangers, as you said we are often not taught about.!