The strong message is that if you don't accept this view of salvation, you really don't have faith in God and your soul is totally lost. For Catholics making use of these kinds of books or curricula, the end result is serious. The children become accustomed to hearing about faith and other matters from the Protestant view. There is no mention of the Holy Trinity, the Virgin Mary, St. Joseph or the Saints, the need for confession after repentance, etc. Those parts of Catholicism become alien to children because the curriculum is permeated with fundamentalism.
Language is a very powerful thing.
How the faith is presented fits with the entire theological construct. Let is be done unto me according to thy word. Repetition is needed for mastery of the concepts in the story of the Annunciation. As a convert to the Faith, I have given much thought to all of this. Now I use Catholic religion and history and reading.