Early medieval Western as well as Eastern church history has its funny bits. The whole filioque controversy was at the forefront of theological disputes on account of what the idea of the procession of the Spirit might do to the honour of the Godhead, the Father of the Trinity. Even before arguing from the perspective of a breach of church council policy (the Latins having added to what was to be kept in perfect faithfulness to the decrees of the Council Fathers), Eastern theologians found the filioque adagio unacceptable on the basis of stealing from the prerogatives and sovereignty of the Father, which was tantamount, in the dogmatic theology of the early medieval Church fathers, to blasphemy and heresy. Right, nothing to object within this framework.
However, I am not going to express my opinion on this futile matter but will simply point out that while this was perceived as a theological abomination, the doctrine of the intercession of saints – so dearly held in the Roman Catholic and Eastern Orthodox church through the century – is not at all reckoned to be in patent breach of the Scripture which explicitly says that Jesus Christ is “indeed interceding for us” (Romans 8:34b).
I am not going to cling to high theology to show how deleterious this whole doctrine is to the power and dignity of Christ as the sole Redeemer and Intercessor. Whatever is added, it diminishes the thing that has been added to. It’s only about Christ, it’s only Him, nothing or no-one else. not below, not above, not adjacent to him. He is the way to the Father and only him.
It is funny: the very thing the church was afraid might happen, actually happened on another front.