A smart move. Sudan’s new rulers are well aware that the Islamists are biding their time, hoping for more support from the military, before they move to regain control of government. Sudan’s new leaders obviously hope to use Israel’s vaunted intell agencies to block such a move. (For unbelievers, recall that in the last decade Israel twice knew where to attack Iranian activities operating in the Sudan.)
The Sudanese have also gotten a taste of Iranian terrorism, Chinese financial blackmail, and the benefits that accrue to neighbors (Ethiopia and Egypt) which concentrate on secular life, vs what happens in, say, Libya. Sudan's got a common border with seven other countries (used to be more, before South Sudan split away) and natural resources are metals mining and oil.