Quem foi realmente o responsável pelo massacre de Houla?

Syrian Rebels Responsible For Houla Massacre? (Outside the Beltway):

Rosenthal also makes note a report from Dutch sources that cite eyewitness accounts from members of the Monastery of St. James in Qara that appear to corroborate the claims that the Houla attack was carried out by rebels and directed at Alawite and Shia minority communities.

None of this is to downplay the brutality of the Assad regime, which has been responsible for most of the violence that has occurred over the past year or so. However, it is a strong indication that the world needs to be exceedingly careful about both becoming too involved in the Syrian conflict, and becoming too closely involved with rebels who may turn out to be no better than Assad himself.

Abermals Massaker in Syrie ( Frankfurter Allgemain Zeitung):

A challenged street called control units of the Syrian army to help the 1,500 meters maintains a military base and promptly sent reinforcement. In the battle of hula, which should have lasted 90 minutes, dozens of soldiers and rebels were killed. During the fighting, the three villages of Hula were sealed off from the outside world.
 
According to the eyewitnesses to the massacre had occurred during this period. Had been killed almost exclusively families and the Alawite minority Shiite Hulas, which is more than ninety percent are Sunni. Thus, several dozen members of a family were slaughtered, which had in recent years by Sunni converted to Shiite Islam. Killed were also members of the Alawite family Shomaliya and the family of a Sunni member of parliament, because this was considered a collaborator. Immediately after the massacre, the perpetrators would have filmed their victims, they issued a Sunni victims and spread the videos via the Internet. Although representatives of the Syrian government confirmed this version, but pointed out that the government had agreed not to speak publicly of Alawites and Sunnis. President Bashar al Assad is a member of the Alawites, the opposition is supported mainly by the Sunni majority. 

[tradução do Google]