The nuclear card is always an option. The doesn't necessarily mean a ground hit. It could mean creating an EMF that would render all electronic useless. this would be very feasable for countries such as Lebanon and Syria. I'm sure the leaders would do what's necessary and face the consequences later (even if it means tribunals)if it means saving the country. So don't rule out anything. These countries are really playing with fire once they put Israel against the wall.
Islamic State destroys part of Syria's Temple of Bel, monitoring group says (Reuters)
from the article: MESS Report / Can Israel fend off a Hezbollah armed with Syrian rockets?