It’s literally what they do. Of course after hearing lander most Somalis respond with “wtf is lander”. If you talk to enough of them you’ll hear “I’m not Somali I’m lander” quite often. Or “I’m not from Somalia, I’m from…” you get the point. An isolationist yet tight night community with only their own.Ngl calling yourself lander sounds weird. It's hard to express a separate nationality when you call yourself Somali, so i get it.
Ethnically they still consider themselves to be Somali.