You can probably find "Catholics" who believe in anything on that basis, and have a website to prove it. There are, however, about 1 billion Catholics, and all believe in the Marian dogmas, without a slightest inclination to deify her.
As you can find "protestants" who will believe most anything. Lumping a few fringe groups that don't believe in the Trinity in with "Protestants" is as offensive as lumping the Mary is God group in with Catholics - except that the Mary is God group actually claims to be Catholics. Jehovah's Witnesses, Mormons, etc., as far as I know do not claim to be Protestant.