Why does the nation of islam never use the prophet of islam,Muhammed(PBUH)in any of their writings?

I am really not comfortable with their teachings,I find it really disturbing especially,what they call the believe of muslims as it appeared in the Final call of December 2, 2008,vol 28 num.8.As muslims we take al shahada,thus"I believe there is no God except Allah and Muhammed is his noble prophet and last menger"Stop the blasphemy,stop using the names of your political leaders as messiahs-to whom praises are due to forever.Subhlah!