Simply put, the so-called Syrian ceasefire is a sham. Contrary to the White House's announcement, it is not a first step towards a negotiated peace in the Syrian Civil War but rather a Russian attempt to forestall any intervention in support of the FSA in Aleppo until Syrian military forces can surround and defeat them.
President Obama is no less committed to military action than any of his predecessors. He might personally have a less gung-ho disposition than, say, George W. Bush. But Obama's personality is only a small part of the equation. Despite the putative end of the Cold War, the United States has remained on a war footing. The national security apparatus is programed for intervention. What we see now taking place in the skies above Syria and Iraq is not an exception to the Obama-as-pacifist rule. It is a summation of a particular evolution in U.S. militarism toward the asymmetrical warfare of dispensing death at a distance.
While the president has justified his plan to arm and train "moderate" Syrian armed groups on the grounds that it would counter the growth of the Islamic State, it will likely have the exact opposite effect. Further funding for "moderate" Syrian opposition groups will embolden IS and risk widening the brutal Syrian war.
The White House formally submitted its $500 million request to Congress on June 26. The money would go to train and equip "appropriately vetted" members of the Syrian opposition. That's a lot different from "moderate rebel forces," and it is yet another indication that we simply do not know who the "moderates" are in Syria.