Because they had grievances about the west, which we all have if we're being honest, but were successfully coerced from people into this completely bizarre state of mind into thinking that China and Russia are some sort of garden paradise utopian societies of peace, love and sunshine, not the reality of both countries being insanely unhinged places.

In both China and Russia, there is no rule of law, no respect for basic human rights or respect for anyone's culture or ethnic background, complete control of the press, anti-LGBTQ+ hate that is literally put out from the government, anti.......

Well lets just put it this way, Chinese Nationalists and Russian Nationalists make the KuKluxKlan look like Bernie Sanders voters in comparison, that's how insane these people are and the respective governments do everything they can to keep that silent and breaking out into the international community.

I know people from China who barely escaped that country and there's just endless horror stories that you can find all over youtube