What is Islam's stance on those who oppose Amazigh rights, and how can one advocate for Amazigh identity without falling into nationalism or ethnic behavior?

Allah Almighty has forbidden injustice to all people, believers and disbelievers alike, and in any type of rights. The Amazigh loved Islam and opened their lands to it, sacrificing for its sake, so their lands became strong fortresses protecting the religion. The injustice they currently face is part of what Muslims suffer everywhere, and they, like others, have no recourse but to turn to Allah Almighty to remove the injustice, and to adhere to the وصية (bequest/advice) of the Prophet, peace and blessings be upon him, in the hadith narrated by Al-Bukhari: "There will be favoritism and matters you will disapprove of." They said, "O Messenger of Allah, what do you command us?" He said, "You fulfill the right due from you, and you ask Allah for what is due to you."