Politics could not exist if people didn't stick like glue to their version of the truth.
Whenever I talk to two people on opposite sides of some problem; political, family, or personal , I soo realise that both sides belief with absolute confidence that there version is the real truth and the other side is lying.
Any discussion of truth other than a completely philosophical one would be a complete waste of time and breath. The two sides would pass each other like trains in the night, talking to their own acolytes, and absolute;y convinced thay they had the monopoly of truth.
Such a debate would be a self indulgent waste of time.