It's a hypothetical in that while a) the primary purpose of the app is to locate a certain group and b) people have died due to attacks targeting that group (i.e. Dallas) there is no concrete causative connection between the two.

While it might better satisfy our sense of justice to wait until we can definitely say that a enabled b, the hazard is obvious, and Apple can reasonably determine that they don't want to be party to it.

> I am aware of private citizens committing violence against the same groups that ICE targets ..

Of course. Does Apple host apps whose primary purpose is reporting the location of those groups?