I'm not a Trump fan but I do applaud his standing up to the Chinese Communist government who thinks they can do just whatever they want.  The very recent action of flying a heavy bomber that can carry a nuclear device around the so called red line in the South China seas, is evident of a government that is out of control as much as Trump is.
Building military islands where none existed tells you something along with their currency manipulation.
China needs a whack on the side of the head and be told "stop it, there are others on this planet too".