Quoting MysticWitchKat:" Why not,they took land that didn't belong to them in the first place. And have not exactly been very conciliatory in forging a reaslitic peace."
The Romans were upset with the Jewish nation and wanted to erase Israel/Judah from the face of the earth. The Romans saw in history that there were extinct people the "philistines" who once were living near that area and were enemies of Israelites so according to Latin spelling the romans invented the new name Palestina. A name which would remind Jews of their old foes. The land was taken from them and eventually Israel got their land back.