Please note how Samakab says 'The Marxuum' and 'allahu naxaristo' when talking about Siad only.
It is not easy to compare cruelty of the above mention individuals but one thing i don't doubt is if Siad ruled Iraq, Kirkuk, Mosoul, Basra, and other cities would be in a mess. Saddam used a small amount of 'arsenal' available to him against his people and can you even imagine 'the marxuum' who put pesticides in wells having biochem weapons.
As for who is worthy to you, I suggest Jim Carey for president of Somalia.