Sounds like Israel is attempting to keep Iranian arms, which will be pointed at Israel, out of Syria.
Related?
Gunmen open fire on Lebanese minister’s convoy, killing two
https://www.aljazeera.com/news/2019/06/gunmen-open-fire-lebanese-minister-convoy-killing-190630164714839.html
Lebanese foreign minister criticized for saying: ‘We are not against Israel living in security’
https://www.jta.org/2017/12/28/israel/lebanese-foreign-minister-criticized-for-saying-we-are-not-against-israel-living-in-security
On a somewhat related note, Moscow has changed its mind and now has the S-400 systems out for bid to the Iranians.
‘Israeli missiles’ launched from Lebanese airspace target military sites in Syria