He made the joke in public, and to a portion of his audience it falls flat (to put it mildly.)
But then there are those of us who have experienced overt racism connected to this phrase who won't be able to read this paper without thinking about that trauma every other line.
We talk a good talk about making tech more inclusive, but it seems when we have an easy and obvious choice, there is resistance. Taking the MAGA reference out of this paper would do nothing to diminish it on a technical level, and it would cause more people to read it. Perhaps even this thread would have related to the technical merits of the paper, rather than the derailment I caused. Yet there are multiple responses here expressing resistance to the idea on principle. Again, an idea that would result in better outcomes for everyone.