I have at least much right to speak as you have. That you think otherwise is one of the leitmotifs of a certain viewpoint prevalent in these discussions.

I have no idea of what “ultra-right” means other than it appears to involve those Catholics who adhere to the Church’s teachings and discipline.

I personally have claimed “NO authority to excommunicate, investigate .... ANYONE”, although the faithful are not only authorized but obliged to admonish.

Excommunication has along history and scriptural basis.

Exclusion from the synagogue was a real excommunication (Ezra 10:8), feared by the parents of the man born blind (John 9:21 sq.; cf. 12:42; 16:2) and foretold to the disciples (Luke 6:22). It was the remedy Christ admonished (Matthew 18:17) for those who insisted on disregarding admonishment.

St. Paul excommunicated the incestous Corinthians (1 Corinthians 5:5) and the blasphemers (1 Timothy 1:20).

It has been practiced by every Christian sect and body.