This is, in my opinion, a key insight. For decades, those who disliked the liberal trends within society voted for the right-wing "conservative" parties hoping that this would change things. It was a grave mistake, as the political philosophy of these parties is generally a right-liberal one. So the protest vote achieved very little - it just kept power safely within the realm of liberal politics.
Back in the 1990s it was common to hear the term "left-liberal" to describe those on the left, whilst those on the right were usually called conservatives (at least here in Australia). I began to call these so-called conservatives "right-liberals" to try to make clear how limited the political choice really was. The late Lawrence Auster was kind enough to credit me with introducing the term:
For years I have argued that neoconservatism is a variant of liberalism, specifically of right-liberalism, the belief in the equal rights and the fundamental sameness of all human individuals, based on a single universal truth embodied in a democratic world order led by America. This right-liberalism—a term first developed by Australian blogger Mark Richardson—is distinguished from left-liberalism, the belief in individual expressive and sexual freedom and substantive group equality embodied in a transnational world order led by the UN and other transnational bodies.
I think we are at the point now where the argument I was trying to make will become more widely accepted. Patrick Deneen, in his recently released book Why Liberalism Failed, makes the point forcefully and eloquently, though he uses the terms classical liberal and progressive liberal rather than right and left liberal.
The text quoted in the Tweet is from a review of Deneen's book written by Gene Callahan. He writes,
American conservatives may be cheered by the appearance of a book entitled “Why Liberalism Failed.” But, in the sense in which Deneen is using “liberalism,” most American conservatives are actually liberals. Deneen’s use is in fact the one common among political theorists, many of whom argue that America does not have a conservative and a liberal party. Rather, it has a right-liberal party, focused on free markets and free trade, and a left-liberal party, focused on social issues.
...The two liberal parties in America compete by pointing to two seemingly opposed but factually reinforcing trends. The right-liberal Republicans warn against the dominance of society by the state, while the left-liberal Democrats point to the tyranny of the market as the greatest threat to human freedom. Thus each party inspires its partisan members by fear of the threat the other party represents. But despite appearances, both parties, in fact, jointly work to expand both the state and the market.
The left is becoming a hostile place for Westerners; white men in particular have been flocking instead to the right. There is not much point, though, flocking to a right-wing politics that keeps the larger social settings in place that are dissolving Western society. To change these settings means breaking with liberalism itself. That's the change that is necessary to make a real difference and to begin to steer a different and more viable course for our society.