We live today in a world where most of the really important developments in everything from math and physics and astronomy to public policy and psychology and classical music are so extremely abstract and technically complex and context-dependent that it's next to impossible for the ordinary citizen to feel that they (the developments) have much relevance to her actual life.
The real irony is that the view of infinity as some forbidden zone or road to insanity - which view was very old and powerful and haunted math for 2000+ years - is precisely what Cantor's own work overturned. Saying that infinity drove Cantor mad is sort of like mourning St. George's loss to the dragon: it's not only wrong but insulting.
Hal Incandenza has an almost obsessive dislike for deLint, whom he tells Mario he sometimes cannot quite believe is even real, and tries to get to the side of, to see whether deLint has a true z coordinate or is just a cutout or projection.