On the SP adoption of invalidity of RCC baptism, see this thread.
https://www.puritanboard.com/thread...idity-of-rc-baptism.85866/page-7#post-1070063
Dr. Ritchie wrote:
https://www.puritanboard.com/thread...idity-of-rc-baptism.85866/page-7#post-1070063
Dr. Ritchie wrote:
The face of Roman Catholicism in America changed markedly during the nineteenth-century owing to mass immigration from Europe. This phenomenon led to fears of a Popish take-over of the United States. Understanding this development is crucial to comprehending the context in which the Old School Presbyterians formulated their novel views respecting Romish baptism, which was probably partly a reaction to both increased Roman Catholic immigration and to cultural "no-popery".
As he goes on to say, this is not necessarily determinative of if they were right or wrong, but one needs to appreciate the context.