Original sentence: In its historical context, the line "Deutschland, Deutschland über alles, über alles in der Welt" ("Germany, Germany above all, above anything in the world") can be understood as an appeal to the German sovereigns to put aside all other projects and concentrate their efforts on creating a united Germany
Edited sentence: In its historical context, the line "Deutschland, Deutschland über alles, über alles in der Welt" ("Germany, Germany above all, above anything in the world") must be understood as an appeal to the German sovereigns to put aside all other projects and concentrate their efforts on creating a united Germany