Because we don't understand the enemy.
The remedy isn't messaging, framing, engagement, empathy, discussion, or whatever else rational people hope will induce irrationals to step into the light.
Trying to sneak science thru the infotainment propaganda blockade ain't gonna work. And is a waste of effort.
Perhaps the alternative is our own media empire.
Fox News was run at a loss its first decade. Something like $500m/yr is spent, at a loss, on the right wing noise machine. All those popular alt-right sites have patrons.
Does the left have anything comparable? In scale and gumption?
I don't know if it'd work. Reason ain't sexy. Versus the outrage and fear factory. But I'd like to try something new.
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Also, impartiality and objectivity is a trap. Just tell your story sincerely, unapologetically. The opponents will blather regardless, so don't share your soapbox.