Somewhat related to the post below, AVI is thinking about how much of politics is about virtue signalling.
I suspect that he overestimates its importance. In politics, there are many factors: likability, charisma, vote-buying, partisan loyalty, and so forth. Virtue itself has never been a major factor in electoral politics, or in any form of governance in history.
However, I would not dispute AVI's several posts over the years about the importance of tribal and affinity signalling in social relations. (Two Ls in signalling? Who knew?)