A private judgment of the Greek bishops only and not an act of the entire Church.
History shows that Rome resisted using the Spanish version of the Creed until forced to do so in 1014. So I go with the popes of Rome before and you go with the popes of after. I go with Tradition and you with novelty.
The popes did not condemn Filioque before 1014. Pope Leo III approved its doctrine but only advised that the word be omitted from the recitation of the Creed.
"Pope Leo III approved [the filioque] doctrine..."
Show us please. If you are right, I will recommend we start dropping more Western saints from the calendar.