Power Line’s Steve Hayward has a chart which shows how various generational cohorts (Z, Millennial, X, Boomer) agree with this statement:
I would end a friendship because my friend expressed a political view that I find inappropriate.
As I’m traveling I can’t show you the chart, but I’ll describe the findings. For all cohorts the liberals are more likely than moderates or conservatives to agree, and those differences are not trivial. Differences between moderates and conservatives are minor and appear non-significant. The number who would end a friendship is larger for the younger cohorts.
Steve’s guess about why liberals are outliers in this data set.
Why are leftists more likely to allow politics to drive their friendship decisions? A lot of reasons come to mind, but one of them is the extent to which politics has become the substitute religion for a large number of leftists. And when their god (or gods or goddess) has abandoned them—when the immanent replaces the transcendent—leftists become embittered.