I suppose a pre-emptive strike on hezbollah would be difficult because their active members probably blend into a large portion of southern and even central Lebanon’s civilian population both near the coast and inland valleys. Once they assemble to fire off missiles at Israel, it’s perhaps a bit easier to strike but here again, Lebanon’s terrain is hilly and probably hides a lot of places where rockets could be launched, locations only apparent after they are airborne.
Speaking of Biblical prophecy, Armageddon is supposed to occur some distance (50-75 miles) south of the border in northern Israel, suggesting, if it has anything to do with this situation, some military invasion is part of the scenario and the invaders get at least that far into Israel. That would suggest a larger power than hezbollah like Iran, Syria, even Russia or Turkey.
Israel will issue simultaneously with its attack on Lebanon the warning that all Lebanese living south of the Litani River should immediately move north of that entity. They will be given 48 hours to move. Then all Hell breaks loose.