How few know the triumphs of Booker T. Washington or George Washington Carver, but almost all know the travails of Rosa Parks.
Regardless of IQ, keeping the victimhood myth alive is a useful tool, based on kernels of truth but embellished and continually stroked to produce an entire class of people who certainly could have improved their lot had they not been convinced they deserved handouts and freebies on the backs of people who never oppressed them.
In keeping with international socialist dogma, those being imported illegally are similarly convinced they have a "right" to what they did not build, in spite of our laws.
The Democrat Party was hijacked by Socialists and Communists pretty thoroughly by the end of the Vietnam War, and the people they are importing from elsewhere have either a pretty thorough indoctrination from their native banana republic, or are Muslim tools being used to cause the sort of chaos and mayhem the totalitarians desperately need in order to complete their seizure of power.
Amen, bro.