Thanks @Olyon for https://osm.org/changeset/162333597

@EttoreV_littoria as @Jrachi already wrote, OSM has the scope to show the real world. In this case you can see both borders, which displays both views. So it is less influenced by nationalism than your change, which only shows one view.

This is not the only "border dispute" you could found on OpenStreetMap. E.g. the dispute between the Netherlands and Germany: https://osm.org/?mlat=53.330053&mlon=6.996918&zoom=12