The liberal elite, especially white traitors, are celebrating the end of their kind as a majority. With Generation Alpha, those born since 2010, the demographics is of a non-white majority. That will be so even if all immigration stops, at least immigration which for decades, as it is across the West, totally biased to non-whites. The date of the fall of white America is taken to be 2045, but given the open US borders, it is likely to be sooner.
The issue here is that the ruling elites firmly believe that the population is fungible and can be replaced like any consumer good with no disruption. That however is contrary to human history, and the replacement of Europeans will certainly lead to the collapse of the institutions their race created.