Courtesy of Roger Ailes and the invention of political talk radio, The United States was the breeding ground for media manipulation tactics that later arrived in Europe, and those have been most heavily utilized by right-wing actors -- think Sky News/The Daily Mail/The Sun in the UK, or instance. When you poll most people about what they want out of government here in the US, they tend to be in alignment with "liberal" values in the US or center-left parties in Europe, but when you ask them if they support implementations of those values by name (i.e., "Social Security" or "Medicaid" or "food stamps" instead of just asking "should the government help needy people stay fed and healthy?" people who consume right-wing media suddenly flip to be against those policies, because they are brainwashed by their media diet to oppose them even though in principle they express support for them.

Bottom line, after almost forty years of Rush Limbaugh and his ilk and thirty years of Fox News deliberately manipulating the American right to become hateful and reactionary in spite of their own natural impulses, the gap between left and right has become incredibly difficult to bridge in any meaningful way. IMO, the only hope for reconciliation is to push those extreme voices out of the mainstream in order to limit their ability to influence the gullible, and there's just not many viable mechanisms to do that.