Russia and America must jointly confront Islamic State

They can achieve this by jointly sponsoring another Security Council resolution under Chapter V11 article 42 of the United Nations Charter which empowers the Security Council to:

...take such action by air, sea, or land forces as may be necessary to maintain or restore international peace and security. Such action may include demonstrations, blockade, and other operations by air, sea, or land forces of Members of the United Nations.

Every day's delay in securing the passage of such a resolution - and acting on it - means further deaths, injuries and suffering for the Syrian and Iraqi populations at the hands of Islamic State. Internal displacement of those populations inside Syria and Iraq, or to neighbouring countries - or even into the European Union - has had disastrous consequences that have shocked all people of compassion and goodwill over the last three weeks.

The time for procrastinating, arguing and blaming is surely over.