They used to say you shouldn’t talk about politics or religion at dinner, maybe even at all. Uniquely divisive, the possibility of disagreement is high and disagreement is to be avoided.
My guess is that your mental list of dangerous topics is much longer now. In the last decade, issues such as Brexit, vaccines, gender and race have made navigating the invisible dividing lines at gatherings like playing Twister.
I have spent a decade trying to understand this growing division.