No, Islam as revealed by Allah swt, does not assimilate people to become Arabs. Current Somalis, through teaching Arab history and total neglect of their own history, are obsessed with a satanic people aka Arabs.
We are Muslims and Somalis and we must ensure we preserve both at any cost
There is an overlap between Arab history and Islamic history. It just happened that way. If you feel like Somali history is neglected or overshadowed, it's on Somalis to teach it. And let's be honest, 'teaching Arab history' is definitely not the reason Somalis are supposedly ignorant of their history.
What is obsessed? Wearing a hijab and jilbaab? Using loans words? Being Sunni? What?