And, so it seeps into Beirut ... and onwards to where???

Look at what the Western powers have started in the Middle East and what Saudi Arabia wants to continue. 

From NOWmedia:
...Al-Jadeed reported heavy army and Hezbollah deployment at Beirut explosion site....
....Al-Manar reports explosion caused by car bomb on Al-Arid Street in Dahiyeh's Haret al-Harayk.....

From NOWmedia:
...The Lebanese Armed Forces deployed in the Beqaa town of Al-Qaa following shelling of the Lebanese-Syrian border area amid heavy fighting between rebels and regime troops on the Syrian side of the border. 
An LAF unit deployed along the border near Al-Qaa and Ras Baalbek as the sounds of explosions in Syria’s Al-Qalamoun were heard by the area’s residents, Lebanon's state National News Ageny reported. 
“The LAF has called in an additional force to prevent any infiltration into or from Lebanese territory,” the NNA said. 
It added that Syrian shells landed in an uninhabited area in Al-Qaa, as well as near Lebanon’s eastern mountains, in Al-Baayoun and Neemat.....