Yes, I remember reading that. I didn't know what to make of it.
Where did this happen? Twenty years after Pio's death, a Pope and a US President brought Soviet Communism to its knees.
Why assume Padre Pio meant the red flag of Communism?
From the Palestine Facts website:
The Meaning of the Arab Flag: RED
The Khawarij were the first Islamic group to emerge after the assassination of Caliph Uthman III, forming the first republican party in the early days of Islam. Their symbol was the red flag. Arab tribes who participated in the conquest of North Africa and Andalusia carried the red flag, which became the symbol of the Islamic rulers of Andalusia (756-1355). In modern times, red symbolizes the Ashrafs of the Hijaz and the Hashemites, descendants of the Prophet. Sharif Hussein designed the current flag as the flag of the Arab Revolt on June 1916. The Palestinian people raised it as the flag of the Arab National movement in 1917. In 1947, the Arab Ba'ath Party interpreted the flag as a symbol of the liberation and unity of the Arab nation. The Palestinian people readopted the flag at the Palestinian conference in Gaza in 1948. The flag was recognized by the Arab League as the flag of the Palestinian people. It was further endorsed by the PLO, the representative of the Palestinians, at the Palestinian conference in Jerusalem in 1964.