What flag is really theirs? Party-list organizations Duterte claims are communist fronts. (The one on the left is the official flag of the Communist Party of the Philippines.)
There is nothing “nationalist” in the Communist Party’s thinking, except in its lip-service to what its founder Jose Ma. Sison way back in the 1960s referred to as “nationalist industrialization,” which neither he nor his ilk can even explain with rigor. Its purported nationalism is merely its vitriolic stance against the US, which of course was required by its Soviet and then Chinese communist mentors during the Cold War.