Your comparison to Taiwan makes no sense because China is not a complete and utter failure filled with terrorists. If it was, it would deserve to be recognized.
'The secessionist ideology in that region was invented by 1 out of the 5 main clans in the north, they cannot force their own political agendas onto others and it's not fair to the rest.' - Many clans in Somalia don't want federalism either, that much is clear. Many also don't want centralism. Why is that political agenda being forced on them? The logic must be applied fairly and evenly.
WHY DO THEY DESERVE TO SECEDE FROM THE COUNTRY?! - if it is a question of being 'deserving' then why does any country 'deserve' to be a country, other than to protect and serve its citizens? Why then does Somalia deserve to be a country? Can you even call it a country? None of the presidents since 1969 have been elected, they don't control outside the capital, they require thousands of foreign forces, people flee constantly due to lack of opportunities and murder by terrorists. Is Somalia and more 'deserving' than SL? Was South Sudan deserving?
SL deserves to be its own country because SL'ers get nothing out of Somalia just as PLers don't. They have essentially been their own country in all but name for the past 30 years.
@Karim Do you believe that SL must stay within Somalia no matter what happens? Even if Somalia crumbles back to the warlord and terrorist era? Where do you draw the line? Are you saying that a country can never break apart?