I learned an important lesson in 2016, my worldviews are not shared in America outside of big cities. It forced me to realize that I didn't even know people disagreed so fiercely because of media conglomerate created echo bubbles.
Many people having non-leftwing ideas simply hide it. Since most workplaces have become politicised and hostile to conservative/right/slightly right of center views, people just hide it. Some people (including me) even engage in fake virtue signalling.
Polling (both opinion polling and actual elections) show that it is very strongly an urban-vs-other thing.
Polling also said that Hillary would win the election, and brexit won't happen. People, including me, lie to pollsters.