По его мнению, важнейшим результато

По его мнению, важнейшим результатом действий России явилось то, что боевикам ИГИЛ не удалось захватить Дамасск, что неминуемо привело бы к резкому обострению ситуации на всём Ближнем Востоке с нежелательными для всех, в том числе и для США последствиями.

Результаты (английский) 1:

In his view, the most important result of Russia's actions was that the rebels failed to seize the IGIL Damassk that inevitably would have led to a sharp deterioration of the situation in the entire Middle East with undesirable for everyone, including the United States and consequences.

Результаты (английский) 2:

According to him, the most important result of Russia's actions was that the militants LIH failed to capture of Damascus, that would inevitably lead to a sharp deterioration of the situation in the entire Middle East undesirable for everyone, including the consequences for the United States.

Результаты (английский) 3:

in his view, the most important result of the action of russia was that to игил failed to capture дамасск,which inevitably would lead to a sharp deterioration of the situation in the middle east with undesirable for all, including for the consequences.