In this article, beneath the Philippines is an oil rich deposit. China, one of the countries claiming sovereignty over South China sea where these oil deposits are, is sending its troops over the disputed reefs.
Currently, the tension is over Scarborough Shoal. The shoal is only about 200 km from Philippine soil compared to 1200 km from China. Old documents prove that the shoal is a part of the Philippine archipelago.
Filipino overseas particularly in the U.S. feel that the presence of Chinese troops over the area is bullying. A big nation like China showing force against a tiny island country like the Philippines. As a result, Filipino overseas worldwide will stage protests against Chinese embassies in major cities worldwide.