Why? He cancelled the event.
By the way, one excommunicates one’s self by action.
Pope excommunicates seven Vietnamese
United Press International/April 7, 1983
By Philip Pullella
Pope John Paul II excommunicated Vietnamese Archbishop Peter Martin Ngo Dinh Thuc and six men he ordained as bishops because of their connection with the “antipope” in Spain, the Vatican said Thursday.
The archbishop is a brother of the late President Ngo Dinh Diem of South Vietnam, who was assassinated in November 1963.
The six “illegitimate” bishops comprised an American, a Frenchman, and four Mexicans.
A document from the Vatican Congregation for the Doctrine of the Faith dated March 12 said Thuc, 85, and the six men consecrated illegally by him or by his substitute had been banished from the church.