I guess I'm missing how the OP relates to Hitler, slavery, ritual human sacrifice.
The story mentioned in the OP states:
County Galway death records showed that the children, mostly babies and toddlers, had died, often of sickness or disease, during the 35 years the home operated from 1926 to 1961
and
The researcher, Catherine Corless, has said her discovery of child death records from the home run by Catholic nuns in Tuam, County Galway, suggested that many of the children's remains lie in the site of an old septic tank.
and
A 1944 government inspection recorded evidence of malnutrition among some of the 271 children then living in the Tuam orphanage alongside 61 unwed mothers. The death records cited sicknesses, diseases, deformities and premature births as causes. In the first half of the 20th century Ireland had one of the worst infant mortality rates in Europe, with tuberculosis rife.
So neglect resulting in an early death rate greater than that of the rest of the country (which was already one of the worst rates in Europe), and a "suggested" disrespectful burial practice, along with admitted maltreatment of the moms. That's bad enough.