Wetangula is a diplomatic greenhorn.
Surely he must be aware that Khartoum regime is a pariah and has been for a long time.
It has supported terrorism and fundamentalism for eons, having hosted Carlos the Jackal, Osama Bin Laden and god knows who else. There is a warrant out for Al Bashir.
Clinton bombed some facilities for manufacturing chemo and bio weapons.
Simply put, Khartoum is an isolated state. You gain nothing by befriending or appeasing Khartoum and you have a reputation to lose!
Life is short. Live passionately.