One can believe abortion (or laws against abortion, for that matter) to be unjust, while also laws against vigilante violence to be just, and thus refrain from

One can believe abortion (or laws against abortion, for that matter) to be unjust, while also laws against vigilante violence to be just, and thus refrain from that kind of action. One can also believe vigilante violence against people given abortions to be just, and thus justify such actions against them. In which case, the question is, "What should someone whose moral code is opposed to yours do?" Which in my opinion is a silly question. For this to lead to anarchy, it must be the case that a significant number of people avoid causing anarchy for the sole reason of following the law for its own sake, without consideration for any punishment for violating the law.