mutual hositilities and suspicions are aggravated by the inability of both proponenets and opponenets of any change to predict convincingly what all of the effects will be of making the change or of not making it.

이거 해석을 어떻게 해야되나요?
그리고 to 이하랑 both proponents 가 inability 를 수식한다는데 그런 구조가 가능한가요?
그리고 맨 뒤에 of making 이거는 무슨 뜻인가요 왜 of를 쓴걸까요?