The usual five minutes of (subtle) hate coming from Roman Catholics aimed towards so-called "Protestants" with the argumentative based on a collection of ill-founded assertions.
An example of that, the writer speaking of Christians baptized elsewhere than narrowly within [Roman] Catholicism;
How would the writer know there be no "infusion...of grace"? He has no way to know, but is making it up as he goes along!
The writer goes on to compare Christian baptisms which take place outside of the narrow confines of Roman Catholicism (including those done in the name of the Father, Son, and the Holy Spirit?) with Islamics publicly confessing their own "faith" (that Muhammad is God's prophet, etc.) which is entirely another thing.
WHAT a STEAMING LOAD that link you brought here is, Al Hitan.
I could point to places within RCC ordinary teaching majik-steeringthem which is at odds with the assertion of the bigoted writer Francis Lynch.
Although in one sense it has been only fairly recently remembered among RC hierarchy in "official" positional statements (such as Vatican II) it stretches all the way back to the 4th century or so, back when Latin Church Catholics and North African 'Catholics' were forced to accede the point that each others' baptisms were entirely valid.