That is true0.1 is negligible for all intents and purposes Somalia is 100% Muslim btw these countries already had Christians for centuries Christianity and any other religion aside from Islam have been introduced to somali in the 20th century.
Somalis we’re historically muslim, you have to understand this is why it’ll never be open to foreign ideologies. Plus Christianity was a product of colonialism. Italian missionaries were surprised by how adherent somalis where. And that’s why somalis did not convert en masse, just like it happened in other african colonies ( although you can argue those were forced conversions)