Renewing ancient heresy is a not-so-charming pasttime of the Usual Suspects. Frankly I don’t think they believe that drivel either.
I find it amusing that some of the people who must have seen literally thousands of posts on hundreds of threads, over the course of the past ten years or so, always “start over” again with the same dumb, over-the-top posts claiming they “know” what the Church teaches about this or that. I can't tell you the countless posts I've seen here explaining Catholic teaching about the Mother of God so clearly, and then someone WHO'S PARTICPATED ON THOSE THREADS comes out with something like, “The Church teaches that Mary existed before God”, or some similar drivel, in spite of it's having been refuted countless times.
Amazing lack of memory, or willful instigation...not sure which. Perhaps they simply don't read the Catholic posts.