Don’t conflate the concepts of mortal sin and excommunication. Imprecision is never helpful in the long run.
Would not the approval/participation in a homosexual marriage ceremony be a “mortal” sin?
Hello Father Arthur, Is not bidens action prideful? Does his actions not adhere to Occult Ideas? Does his Actions and Words not contribute to, or sympathize with Gay Rights Groups? Has he Lied in that he promoted sins of the flesh/gay/lesbianism as not a sin (mortal at that)? is he in Accomplice to another‘s Grave Sin? Is he most likely considering all these past mention actions, Desecrate the Holy Eucharist (SACRILEGE)?
If you can honestly say he has not then you may have a point, however the facts are he has/is Publicly doing All these, thus he is in Moral sin and I will pray for his soul and those he infects.
And I haven’t even touch on the subject and sins of Abortion...
God Bless
One other thing Father Arthur, To your point of Conflate. The sins them selves do not Excommunicate him it is the sins combined with the fact he is Publicly doing so and calling Himself Catholic. He Cannot be and You along with All the Clergy have a Duty to Call Him, first in privet, then Publicly, to Repent, Recall and Correct his previous Public Errors on this because it is His actions and those of others like him in the public square that are causing defamation of the Church.
God Bless