What comes to mind is that the first thing Brown did at the Harper's Ferry terminal was to kill a black man. Roeder didn't shoot a baby, that I know of.
It is not clear who killed Hayward Shepherd, the black baggage handler or why, but that is irrelevant. Brown became a symbol and was revered because he made slavery an equivalent evil to his actions. Likewise Roeder has equated the murder of an abortionist with the murder of 60,000 babies by Tiller, if not in the hearts and minds, certainly in the dialog of the American public.