We’re angry because we don’t like them and their presumption that they are entitled to rule the world. From Ann Coulter at townhall.com:

Source: AP Photo/Richard Drew
Today we’ll talk about how to write the classic New York Times column, using Thomas Edsall’s recent “Trumpism Without Borders” as our example. It must have taken him about 40 minutes to write it.
Edsall blames the populist movements sweeping the globe on the same ills that “led to a right-wing takeover of the federal government by Donald Trump.” To wit: “anti-immigrant fervor, political tribalism, racism, ethnic tension, authoritarianism and inequality.” Fascism awaits us unless we keep importing low-skilled immigrants and shipping jobs abroad!
For someone worried about the erosion of “democratic norms,” maybe Edsall shouldn’t be referring to the outcome of a free and fair U.S. presidential election as a “right-wing takeover of the federal government.” We had an election, pal.
But ever since the 2016 election, there’s been a frisson of viciousness to the elites’ usual contempt for ordinary Americans. Never mind that Trump ended up betraying his voters. The establishment is appalled that the issues he ran on were popular. Five years later, they still sputter in rage, unable to comprehend why Jeb or Hillary didn’t end up in the White House.