>>740481
Catholic does not only mean "universal" but literally "concerning the whole". Western saints have traditionally interpreted it to mean "universal" on the level of its scope and evangelization, while Eastern saints have traditionally interpreted it to refer to the fact every local church, an eucharistic community centered around the bishop, is in itself the fullness of the Church (a notion that Catholics have revived with Vatican II).
Nonetheless, any dispute or break of eucharistic communion between two churches is obviously dramatic and an offense to the catholicity that Christ prayed we should have. However, if a community is entirely excluded from the canonical Church then it ceases to be part of the Church entirely - no sacraments, no clergy, no saving grace. This isn't the case here - Moscow and Constantinople have a dispute but 1) Moscow may have broken communion with Constantinople but Constantinople hasn't returned the favor yet, and 2) they are both still in communion with the other canonical churches so neither can be called schismatic unless one decides to ignore the judgement of the other churches, which would be a statement of supremacy if anything.
>>740485
I don't know what "invisible church" ecclesiology you have in mind, and I don't know where you have seen any Orthodox say this was not a big deal.
>>740676
Surely you know that the "Orthodox" half of this picture conflates Chalcedonians and Monophysites. Surely you also know that the Catholic Church is made of 20+ churches as well.
>>740701
Western people had access to the Atlantic, made colonies, and brought Catholicism (and Protestantism) with them. Middle-Eastern Orthodoxy got screwed hard by Islam. Really not that surprising at all that the current outcome is this. But times change - at one point, the Church of the East was the biggest communion, at another point, the Eastern Orthodox Church was the biggest communion too.