"The Catholics are protestant since they protested the Orthodox not accepting the Frankish innovation of the Filioque clause to the Creed."
There is a great deal more to it than that, but in any event, the priest in the article said "Protestant", not "protestant". In either event coming from an Orthodox priest and directed toward Catholics, it is an unwarranted slap and bespeaks a mind clouded by baggage from a former faith.
I say it as well and with a capital P and agree 100% with it's use.