No, The cannot use it as violation because even though us claimed neutrality, they still had weapons and ammo on the ship
:Article III, Section II of the Constitution establishes the jurisdiction (legal ability to hear a case) of the Supreme Court. The Court has original jurisdiction (a case is tried before the Court) over certain cases, e.g., suits between two or more states and/or cases involving ambassadors and other public ministers.
They had to face slavery, and whites had the authorities that colored people didn't.