Monumental South Arabian inscriptions has been deemed to be native to Ethiopia. It's development can be seen in the D'mt empire (precursor to Aksum), were it transformed from simple archaic writing to MSA. It's final transformation was the adoption of vowels when it became prevelent outside the courts in the Agazie civilization.
So move along...we don't need you to taint it.
South arabian isn't native to the horn, you imbecile, otherwise it wouldn't be call south Arabian, would it? Are you sniffing glue again?