Currently every "western" country seems to be busy to expel Syrian diplomats. So far Australia, France, the U.K., Germany and Canada have done so. Others will likely follow later today.
I believe that this is happening now to catch the headlines and thereby to cover up different rather inconvenient news item that ran a few hours ago.
After the Houla massacre the UN monitors emphasized that some ammunition debris was found in the area and that this pointed to government guilt in the killing. That was also emphasized in the UN security council press statement. But earlier today the severity of these allegations were seriously degraded:
Most of the 108 people killed in Syria's Houla region on Friday were summarily executed, the UN says.
…
Rupert Colville, spokesman for the UN High Commissioner for Human Rights, told journalists in Geneva that initial investigations suggested that fewer than 20 of the victims in the village of Taldou, near Houla, were killed by artillery or tank fire."Most of the rest of the victims in Taldou," he added, "were summarily executed in two separate incidents."
Most of the people were killed by throat cutting or by direct gun/pistol fire. The killing happened in an area that is supposedly under the control of the Free Syrian Army.
How could the Syrian government be responsible for this? And why would a government with all its military might resort to such by-hand killing? How would ut supposedly benefit from this?
It is by now well known that AlQaeda like groups are active in Syria. Such are known to have created such massacres, including by beheading, in Iraq and elsewhere.
But as this becomes more clear "western" governments are busy to create some new headlines and to punish the Syrian government for something that was very likely outside of its realm of control.