A recurring complaint throughout history

Excerpted from Güntheritism: A Very Poor Introduction:

"The Revel Catechism was the first work widely published in the Livonian language. The Balts were among the last peoples of Europe to embrace the Christian faith, a task that the Knights of the Order had never thought to undertake themselves. This was brought to the Master's attention after he was settled in Riga; claims of the "Livonian Trinity" of Jesus, the Blessed Virgin and St. George the Dragonslayer remain hotly contentious to the present day, although it has been immortalized in Baltic profanity...

17th century:

• The pagans honor more than a hundred festivals throughout the year, although through a translator the high priest of the petty-kingdom made it clear that he was attempting to bring to an end those festivals most egregious to reason and the Christian faith. All are devoted to the goddess Nostradamme, whose cultus has prevailed here, would you believe?, since deepest antiquity, when the true faith was first brought to our forefathers in Paravour [Paravur]; indeed foremost in this bewildering army of idols and shrines are Nostradamme, Ceinmartyn [St. Martin] and Sin-Lauoit [St. Louis], proclaimed with all the fervor that we of the true faith proclaim Father, Son and Holy Spirit. Such fervor they would bring to the faith! And such difficulty to wean them away from their idols! -the Nestorian Epistles

19th century:

• The profound shame of ignorance afflicting the Russian people was perhaps best illustrated by a muzhik, who, asked to identify the persons of the Trinity, answered "Why, Jesus, the Theotokos and Saint Nicholas the Miracle-Worker!" -A. V. Tversky, Education in the Chernozem Between the Two Evgenies

20th century:

• To Major Hatategawa: It is with deepest concern that I write to address the spiritual state of the soldiers in your care. ...the Sakizaya Regiment in particular is of the profoundest gravity, so poorly catechized that only with great trepidation did I permit them to partake of the Blessed Body and Blood of Our Lord. The triune God of the Scriptures and the Holy Mother Church is unknown to the men of the Sakizaya Regiment. All they worship is Our Lady and Saint Francis and the Holy Face of Jesus... -Fr. Damian Kurusuyama, O.F.M, during the Russo-Japanese War

Doubtless there are others. They can be filled in as I go.