If someone begs repentance for any sin, they will be forgiven and allowed back in communion.
Presumably there are no pedophiles in the ministry who say: "Pedophilia is perfectly moral and acceptable, therefore I do not apologize because I have done nothing wrong."
Such an individual would be excommunicated, since they have committed one or even two of the four sins that the Scriptures say cry out to Heaven for vengeance.
However I would think that all of those in the ministry probably admitted what they did was evil and have begged for absolution - which the Church cannot legitimately deny to someone who is penitent.
The issue here is that many people actually do say: "Upholding the legality of abortion or destroying human beings in the name of scientific research is perfectly moral and acceptable, therefore I do not apologize because I have done nothing wrong."
Such individuals, because they are impenitent and refuse to acknowledge that they have done evil will be excommunicated.
Excommunication really hinges on the attitude of the transgressor towards their own transgression. Anyone who begs forgiveness and seriously resolves to sin no more can never be permanently excommunicated.
Well, what if an abortionist begs repentance, is forgiven and goes and commits more abortions the next day? Then when caught, gets forgiven, accepted and goes and commits abortions again. At what point does the Church get real? Here's my guess - they "get real" very quickly with abortionist, not so quickly with priests who are having sex with other men, and not quickly at all with priests who are boinking the alter boys. Really, many of us don't have all the built in excuses for this type of evil behavior... And yes, "evil" is the word.
"Pedophilia is perfectly moral and acceptable, therefore I do not apologize because I have done nothing wrong."
Maybe you are not aware but this idea is gaining credibility among sexual scientists and in academa circles. Just as they normalized homosexuality look for sex with children to be normalized in a few short years.It is called generational sex (sex between generations).