The country with the most Berber speaker is Morocco. Especially in the High Atlas Mountains where there are three million people who know the language called Tamazight. From west to east, the statistics show that the amount of Berber speaker is decreasing.
I think we should keep the culture of the Berber languages because otherwise, it would finish like the hieroglyphic script. No one would understand the language and the world would loose a civilization and a knowledge. We also have to preserve it because if the language dies, the people who speak it would have no ways of communication.
I think it would be selfish to say that it is not recognized as an official language so there is no importance attached to it. We have to think that the Berbers are proud of where they are from and don't want to change their culture for something more "recent"
