[gbcdoj]

Pius IX's kidnapping of a Jewish boy and his forced conversion to the Church.

It's no surprise that the trads aren't opposed to it:

In this case, indeed, they ought not to be baptized, but be sent back to those in whose power and trust they are lawfully placed. But, if they have been already admitted to the sacrament, either they must be detained or recovered from their Hebrew parents and handed over to the faithful of Christ, so that they may be piously and religiously trained by them; for this is the effect of baptism, which, though it be unlawful, nevertheless is true and valid. (Benedict XIV, "Postremo mense", DS 1490)

[AskStPhilomena]

"It's no surprise that the trads aren't opposed"

It's even less of a surprise that modernists managed to get John XIII beatified....
http://www.traditioninaction.org/HotTopics/a006bIncorruptPopeht.htm

[murphE]

"In this case, indeed, they ought not to be baptized, but be sent back to those in whose power and trust they are lawfully placed. But, if they have been already admitted to the sacrament, either they must be detained or recovered from their Hebrew parents and handed over to the faithful of Christ, so that they may be piously and religiously trained by them; for this is the effect of baptism, which, though it be unlawful, nevertheless is true and valid. (Benedict XIV, "Postremo mense", DS 1490)

I have an idea, let's replace the words "Hebrew parents" with apostate, heretic, or dissenting Catholic parents and implement this right away!