Why are most of the artists in the USA democrats?

[loramin]

If, hypothetically, the following was true:

A) there is in fact an incredibly pervasive and deep-rooted set of pattern matching algorithms in our brain, left over from a time long ago in our evolution

B) these "algorithms" are responsible for institutional racist thinking (to put it another way, seeing a person of ___ color on TV doing ____ does convince your brain that in general people of ____ color do ____, because those pattern matching bits aren't sophisticated enough to tell what's on TV apart ... because they evolved long before TV existed)

C) that a person's thinking can be changed by changing the pattern inputs

what kind of proof would convince you of it?