It's both, but Hezbollah troops are less than 20k what they have > 120.000 is missiles, those can make a big harm, but Lebanon and Nasralah know they dead meat if it happens both for Lebanon and Syria.
America would back up Israel in case of a Russian attack but D.T. will get assassinated very soon for this in my opinion. Everyone knows if Russia attacks Israel and it's WW3 in a second. You can count with most of Russia destroyed if it happens and probably almost only 1/3 of the people here would survive.