Are Black People a Monolith?

It may not be politically correct, but so what if blacks act this way for serious political reasons. See article

"There are good reasons why, even in Democratic presidential primary campaigns, large majorities of black voters do end up supporting the same candidate.Political solidarity is not an innate characteristic of black America; it is a survival tactic that adverse experience has reinforced time and time again. Chattel slavery and Jim Crow paid little mind to the specific talents, abilities, and aspirations of each black person. Simply being a member of the race was sufficient to be disenfranchised and oppressed. Black Americans have been made acutely aware that their individual fates are linked to the wellbeing of the whole group"