I think the strike came after all parties admitted that Hisbuallah is involved in the conflict in Syria. I believe Israel's attacks on Syria is to provide the regime a cover/excuse/reasons to explain Hisbullah's involvement. The argument is now that Israel is on the side of the Rebel and Hisbullah is on the side that is against Israel.
Labor court orders Jerusalem light rail operators to return to work (Haaretz)
from the article: Why did Israel attack Syria now, and why did the Syrians admit it?