In the end, Prime Minister Netanyahu would not be coming to America, he would not be risking the most important national security arrangement that Israel has if it wasn't for the fact that he believed in his heart that Iran's and the United States` nuclear negotiating is going to end up being an existential threat to his country. —CNN Student News
I read this sentence several times, but I can't grasp the meaning of it. The structure is too complicated. Could you help me understand this sentence?
My guess: In the end, Prime Minister will come to America nevertheless the visit can risk the most important national security arrangement (which is, I guess, the amicable relationship between the U.S and Israel), because the negotiation can be a serious threat to his country and he wants to stop it.