Everyone knows Israel excels at blitz-style warfare for a reason. Unexpected, overwhelming violence > *, it's the reason they have nukes and people know they might actually be used.
That's why this little shindig in Beruit is going the way it is: Iran and Syria know that Israel would have a hard time sustaining a conventional siege war. They're trying to grind Israel down, and with the antisemitic euro-press, there has been a bit of grind. Not enough to even dull the IDF's edge, though.