It is reasoning logically from the cause to the effect and the general to the specific
i.e.
the attached picture
It has a
negative connotation, suggesting instability and stymied progress.
A connotative meaning is something that is associated to or
an expression carried by the dictionary meaning of the word. The possible
connotation of “quicksand” is “instability and stymied progress” as its primary
meaning which is an area/situation that is difficult to escape can be
associated to describe the racial injustice of the nation, as the excerpt says.