St. Maximos and St. Athanasius were NOT in communion with their bishops. St. Athansius was NOT in communion with Pope Liberius who arguably was an Arian.
Address the content of his arguments. Pivarunas is a Thuc bishop.
They were in communion with the Holy See, and they did not break communion with their bishops - their bishops excommunicated them.
Trying to parallel Pivarunas who is in schism with the Holy See with a saint who was unjustly disciplined by a wayward bishop is specious.
And they were still obedient - Athanasius obeyed his ordinary and then appealed to the Holy See to remedy the injustice.
St. Athansius was NOT in communion with Pope Liberius who arguably was an Arian.
Liberius was no Arian - a ridiculous claim. He wrote letters against suspected Arians and chose exile rather than approve Arian doctrine. This is slander.
And Athanasius was always in communion with Liberius - preposterous falsehood here.
Address the content of his arguments.
Pivarunas' argument: "I don't like Vatican II and I don't like the stuff John Paul II did, so I think it's OK to commit a mortal sin and I encourage everyone else to do so."
Answer: Schism is a mortal sin and it is never permissible to commit a mortal sin for any reason.
Pivarunas is a Thuc bishop.
Then he is no bishop.