Personally, I find it very understandable when two countries or cultures have differing viewpoints about what's right or not. However, I think it's imperative for their integrity to accept rules and international courts if you sign up for it. Many countries have been culpable of such incidents, and they're always in the wrong for unilaterally breaking such agreements. This time, it's China doing so. Don't sign up for common rules if you don't intend on following them.

Sure there are propaganda and opinions everywhere, but the question of integrity and ethics is clear in this example.