I believe that the Catholic use of ‘Fundamentalists’ attempts to broad-brush paint anyone (like me) who sticks to scriptures at the expense of dissing their oral traditions. I don’t believe it hits the Fundamentalist faiths specifically... but it would certainly include them by implication.
The term "fundamentalist" has both a denotation and a connotation. The denotation is unchanging factual truth. The connotation is "inbred swamp-dwelling redneck moron" (which is why Blacks aren't considered "fundamentalists" . . . well, that and the fact that they've sold out).
The original "fundamentalists" of the late nineteenth century were very intelligent, intellectual people from the large cities who opposed liberal theology and higher criticism (at one time their headquarters was actually Princeton University). It didn't mean someone who hangs "people who are different" from lampposts. It didn't mean rural Southerner. It didn't mean someone who uses the words "you-uns" and "fixin' to" in everyday speech. These are all connotations created to discredit traditional orthodox theology.
When Catholics insist that their religion is not "fundamentalist" it must mean one of these two things: either that it is liberal and opposed to traditional orthodox theology, or that Catholics refuse to sully themselves by mixing with rural white Southerners.
Unfortunately for you, "sola scriptura" is nonsense (since the G-d-dictated Torah consists of nothing but a string of consonants with no vowels or punctuation) and the rules for writing a Torah Scroll correctly (so that it matches exactly the Torah dictated to Moses) were handed down orally and are not actually recorded in the Torah. Also unfortunately for you, you have been "vaccinated" from ever considering the Oral Torah and rabbinic authority because you have heard nothing but the Roman Catholic/Eastern Orthodox case against sola scriptura (which is pathetic) all your life. Well . . . that and the fact that you believe scripture simply must be absolutely clear so anyone anywhere can read it in his own language (which is no longer the text dictated by G-d) and be "saved." All this is nonsense completely at odds with the Torah as understood from Mt. Sinai, but you will never listen because any argument for an authentic authoritative oral interpretive tradition sounds like a defense of rosary beads. More is the pity.