It's not about mistreating people at all. Somalia has a growing population of non-ethnic Somalis, most recently from Arab countries. As you can see from the previous thread, they are even importing other madoow and a Berber to play in the football league.
We need to define who is a Somali ethnic, what Somali ethnic culture/dress is and preserve it using official authorities. For example, even the written Somali language has been corrupted by years of a lack of a government.
If we confuse/muddle who a Somali ethnic is, this can cause problems down the line.