Why do we have belief perseverance?

Belief perseverance is the tendency to maintain one's beliefs even in the face of evidence that contradicts them. We see this tendency with all kinds of beliefs, including those about the self and others, as well as beliefs about the way the world works, including prejudices and stereotypes.

can you give a picture of the map, i'll be able to update my answer!

yes

it is because 3 because the citizen the northern democratic party watned the warning on red to blue because it is purple. lol