Zuckerberg is just having a streak of bad luck with the release of his Libra stablecoin. He initially advertised his coin very loudly and attracted close attention from US regulators. They saw it as a threat to their financial stability, and the finance ministers of the European Union countries bluntly stated that they would not allow Libra to circulate on their territory.
In December last year, it was announced that Libra would be registered in Switzerland under the new name Diem and would be backed only by the dollar. It was supposed that this will happen in January, when all the necessary permits from the Swiss regulators will be ready. However, it turned out that there is already a cryptocurrency company in England that uses a cryptocurrency called Diem (translated as Day) and it intends to defend its right to the brand in court. This seems to be the main reason why we are not seeing this stablecoin.
I don't think it has anything to do with racism.