"Silicon Valley money wants to remake people in their images, they have a Protestant zealotry associated with their money that makes any oligarch look straight up sympathetic in comparison"
The comment literally suggests that Silicon Valley billionaires (which it juxtaposes with old money) have a Protestant fanaticism associated with their money.
It has everything to do with a moral perspective - that righteousness and wealth go hand in hand, and it does indeed come from the culture of the European Reform. It's not a matter of Christianity, it's mostly absent from Catholicism, and I suppose other strains.
Think of the meaning, the moral implications, of the phrase "the deserving poor". Try translating it into other languages, and see what happens.
I also think it's actually not that confusing, assuming you're experienced in reading English. It might be more subtle if you spend most of your time in other languages.
There is the root of your misunderstanding.