This suggests that the position of US about of the issue is that "This land is yours" is debatable.

However the majority opinion of western world which is shaped by MSM has another view that "(A) This land is not yours and (B)it's not debatable". They only mention the issue is "debatable" when the position of US official position is against their opinion. Underneath they still believe there's no controversy that Taiwan is not part of China due to their hidden ideology.

Decoding hidden part of people's mind based on their output is more interesting than the original topic and also itself is quite controversial.