To call him a nihilist based on his views of Mathematics is a bit too reductionist, I think?
All Mathematicians are human, not all humans are Mathematicians.
Humans look for (and find) meaning wherever they can.
All Mathematicians are human, not all humans are Mathematicians.
Humans look for (and find) meaning wherever they can.
So it kind of begs the question: What does Mathematics mean to a Computer Scientist?
Least we forget that Ed Nelson was a strong proponent of Ultrafinitism ( https://en.wikipedia.org/wiki/Ultrafinitism )