The recent events make one thing clear above all: It's time for the US to return to a credible and serious policy for Syria and the entire Middle East. Assad, with his partner Russia, is still committing terrible human rights crimes against millions of Syrians, and as long as Washington allows the Syrian regime, Tehran, and Moscow to dominate the country, Syrians will continue to suffer.
It's bizarre for the US to pretend to defend itself in Syria when its presence in the country is actually illegal - unlike that of Russia and Iran. By occupying parts of Syria, the US is not concerned with the fight against the so-called Islamic State, but primarily with control over Syria's oil and gas. Only if the US and its partners leave Syria will the country be able to find lasting peace again.