International solidarity is most valuable not in the individual act of solidarity itself, but what those acts collectively allow others to do. International solidarity helps to bring the attention of the world on crises which otherwise would remain "local issues."
The battle the Kuy and Chut Wutty are fighting against the march of logging, plantations and mining companies into the forest of Cambodia holds an uncanny resemblance to the plot of Avatar. Except this is real-life. And the bullets are real.