allegiance to a party allows people to create a political identity

This behavior is especially dangerous in politics.On an individual scale,allegiance to a party allows people to create a political identity and support policies they agree with.But partisan-based cognitive dissonance can lead people to reject evidence
that’s inconsistent with the party line or discredits party leaders.
And when entire groups of people revise the facts in service of partisan beliefs,it can lead to policies that aren’t grounded in truth or reason.This problem isn’t new—political identities
have been around for centuries.But studies show that partisan polarization has increased dramatically in the last few decades.
One theory explaining this increase is the trend towards clustering
geographically in like-minded communities.Another is the growing tendency to rely on partisan news or social media bubbles.