According to the group, the Supreme Court should not take up this case because the plaintiffs – gun rights advocates – are looking to "thwart gun safety legislation" and have the desire to "expand the Second Amendment." The other argument they make: the Second Amendment and gun control is a political issue and the Supreme Court is supposed to be impartial, not a legislative body.
Translation: gun control proponents have realized this is a lost cause and, if the Supreme Court decided in the case, this could expand gun rights, not restrict them. This case could and would, more than likely, build upon both Heller and McDonald, which protects a person's right to own a firearm in their home for self-protection.