They are not. It's the eastern imperialists that are causing this. And if it's a choice between eastern imperialists (China and Russia) and western ones, it seems that Iranian people by far prefer the western ones.
For three main reasons.
1. Culturally Iranians are way more aligned with west.
2. Western imperialism results in more democracy. Not 100%, but not this bad.
3. Economically countries under west's influence do much better. Iran is extremely poor right now.
Just trying to understand.