They're intended to be offensive, and the people who make them and (presumably) the people who wear them are fully aware of that.
Waxaa Kale oo isna madasha ka hadlay ganacsade ismaaciil cago-weyne kana mid ah guddida dhismaha wadadda cad wuxuuna ka warbixiyey halka ay howshu marayso iyo waxa ila hada u qabsoomay. waxa kale oo uu ku gubaabiyey dhamaan dadweynihii kasoo qayb galay shirka sidii looga wada qayb qaadan lahaa dhismaha wadadda cad.