Despite the atrocious nature of Russia's attack on east Aleppo, it would be absurd for the US to intervene against it. Kerry wanted to do this, but Obama wisely refused.

Islamists such as formerly-al-Nusra (also formerly al-Qa'ida) are the main force on the other side, and it makes no sense to intervene in their favor.

The only force in Syria that deserves support is that of the Kurds, and it is far away from Aleppo.

The West Has to Look Beyond Aleppo's Agony.