This goes right along with all the other grievance mongerers they cultivate.
Since this is a graphic, it's hard to appreciate the full context of the quote and how devastating it really is. Here it is:
"There is a class of colored people who make a business of keeping the troubles, the wrongs and the hardships of the Negro race before the public. Having learned that they are able to make a living out of their troubles, they have grown into the settled habit of advertising their wrongs—partly because they want sympathy and partly because it pays. Some of these people do not want the Negro to lose his grievances, because they do not want to lose their jobs…There is a certain class of race-problem solvers who don’t want the patient to get well, because as long as the disease holds out they have not only an easy means of making a living, but also an easy medium through which to make themselves prominent before the public.”