This is a way to prevent Syria resupplying Hezbollah and prevent it should it come into the war from capturing any part of Leblanon.
If Syria comes into Lebanon they will only get a short distance before they have to fight Israelis. Then since the Israeli army is much superior to Syrias' army it will not be long before they are fighting on Syrian soil.
This has to be done if they are going to really kick butt in Lebanon.
Exactly so.
I can just imagine Nasrallah's next speech.
"The IDF is in the Bakaa Valley. This is a Hezbollah victory!!!""