Bishop Vasa on reasons for and purposes of excommunication

This comes from Fr. Zuhlsdorf's blog, What Does the Prayer Really Say?

The press would undoubtedly accuse Bishops who talk or even think about excommunication as being tyrannical power mongers but this is unfair. Excommunication is a declaration, based on solid evidence, that the actions or public teachings of a particular Catholic are categorically incompatible with the teachings of the Church. It is intended primarily as a means of getting the person who is in grave error to recognize the depth of his error and repent. A second reason, while somewhat secondary but no less important, is to assure the faithful who truly are faithful that what they believe to be the teaching of the Church is true and correct. Allowing their faith to be shaken or allowing them to be confused when Catholics publicly affirm something contrary to faith or morals, seemingly without consequences, scandalizes and confuses the faithful. This is no small matter. The Church, and particularly bishops, have an obligation to defend the faith but they also have an obligation to protect the faithful. We do not generally see the dissidence of public figures as something that harms the faithful but it has a deleterious effect upon them.

Read the whole thing at Fr. Z's blog or at The Sentinel.