Partisan issues don't exist because articles like this are useless and ineffective. Partisan stances on this sort of thing is what makes people believe articles like this are useless. You have it backwards.
I would absolutely agree, though, that there is no such thing as a cultural 'shared reality' anymore. That is the base of the problem. There are very, very few shared experiences, and a section of the population is not, seemingly, even interested in trying to understand someone else's viewpoint.