Charlie
Radek Cerny
Well, I'm from Asia myself.
If you are as obsessed with history as me, you should look at the track records of Asian players in Europe over the years.
You still have not answered the question. What is the evidence that can substantial your claim that Asian players lack mental strength other than your own personal belief?
If anything, Asian players like Kagawa and Son probably have to endure racist behavior like yours and doubters like you every single day while playing in Europe. This should show that they have the mental fortitude, resolution, and determination to do whatever it takes to succeed in Europe.