Totally agree. However Lebanon is in a hard place due to its size, neighborhood and past experiences within the country itself (Lebanese civil war) and how divided (politically) most of them are. The splits between Lebanese Sunni Arabs, Lebanese Shia Arabs, Lebanese Christian Arabs and minorities such as Druze, Maronites, Armenians etc. Add to this the Palestinians living in Lebanon since decades and most recently a large influx of Syrians (mainly Syrian Sunni Arabs who are anti-Al-Assad).
I have not even mentioned Hezbollah (a foreign-controlled/influenced) militia within the country itself that is stronger than the Lebanese army. We all know the state (usually) of countries where militias/gangs/call it what you want to, are stronger than the national army. It's not pretty most of the time.
BTW here Tunisia is more blessed as it lies in a more "save" neighborhood far away from non-Arab hostile countries. You can only think about Italy, but they are not hostile today. Mussolini is long gone. Tunisia for instance is trapped between Algeria (a regional Maghrebi power) and Libya.
For instance both Algeria, Libya are most worried about their Southern borders and the security threat from the Sahel, not to say mass-migration.
As for this news, I consider it doubtful. What would Russians gain? They already have a decade old presence in Western Syria (next door) in Latakia. Strange move IMO.