I am a European living in Europe as an expat. I understand that it is not easy for people from other continents and culture's to integrate in European societies. Most of the time it is not of their own fault. As a natural defense mechanism, they fall back to the only group they perceive accepts them: their ethnic people and homeland.
However, by virtue of not living and working in their homeland and feeling rejected in the foreign land, they develop an idealized and romantic view of their homeland. This can be dangerous. This is a mechanism that contributed to some of these people to be duped into joining terrorist cells. Other went to fight for ISIS in the Middle East, even though they were born and raised in Europe.
Stop and think why Taiwan matters in your life. What is your connection to that island? How will it improve your life if China reunifies with Taiwan? What will happen with your life if China doesn't reunify with Taiwan? Aren't there other, more meaningful pursuits in your life?
Can you explain my case then? I'm Spanish (not ethnically Chinese), born and raised in the West, living and studying in China.
I think the problem here is that – as some users have already pointed out – your own indoctrination and absolute ignorance about China makes you unable to understand our position.
We have lived in the West for most of our lives, we have lived in China, we speak English, we speak Chinese. Do you really think you know more than us when it comes to comparing the West and China? Do you really think you can have an objective, informed, and non biased point when you haven't lived in China and you can't even speak Chinese? Short answer: you can't; you have far less knowledge and understanding about the topic.
Oh, and one last thing: sorry to break it to you, but some people end up loving China and having those points of view, not because of racism, but because they see the hypocrisy, double standards, imperialism, hubris and bullshit of the West. Usually these people are well informed and know both sides of the coin, that's why they arrive to the inevitable conclusion that China is right. Next time don't make assumptions and don't use fallacious logic, it makes you look like a pretentious pseudo intellectual clown.