What could happen is something along the lines of...
Israel targets the leaders of Hizbollah in Syria, bringing strong condemnation from Iran and a retalitory strike from Syria sending 100's of missiles back across to Israel, which further enrages Israel and they go all out attacking Syria with mass bombings,killing hundreds of people. They then also target the president of Syria, narrowly missing him, he gets so pissed he orders a full on chemical weapons strike against Israel, Israels arrow system cant shoot them all down and over 1000 missiles loaded with chemical weapons get through and rain down on towns over Israel. Israel thinks its very existence is under threat and launches a nuclear strike and wipes Damascus out completely. Iran totally enraged by this declares war and launches there one nuclear weapon that they bought from Pyongyang a couple of months ago, striking Telaviv and wiping it out. Israel retaliates with the rest of there nukes and wipes out most of Iran. North korea sees this as its chance and launches a full scale attack against the south, meanwhile All the other Arab countrys so incensed by Israel attack it at once and as Israel lost most of its weapons and has no more nukes left they are quickly overrun and slaughtered. America while fighting back the north koreans launch nukes of there own at the countrys that wiped out Israel. China, so incensed by losing all its oil supplies and worried about North Korea being overrun by Amerca warn America not to corss into the north,which they do so China attacks them in Niorth Korea and pushes them back all the way to the bottom of the peninsula, America then launch a nuclear strike against North Korea and catch 1 million chinese troops that where securing the north and kill them all getting China so angry it launches a full scale Nuclear strike against the states which repsonds with a full nuclear strike on china proper, killing over 500 million people and completely decimating the country,although America herself lose over 100 million and all its infrastructure are destroyed setting her back over 100 years.
Regional wars rage across the globe, with Russia filling the power vacuum by trying to ahcieve global domination and enslave the human race, which actually works against it and reunites what is left of mankind aginst her in a war that lasts for over 200 years, until unbeknowen to man, aliens have been watching all this and decide its time to take over the world,using humans for a food supply. Since there is not much left to defend ourselves with it only takes 3 years for peace to rain in the form of all humans are kept in incubators until there teenage years where they are shipped back to Ureap5 which is the aliens home planet and we are sold off as meat in a supermarket for 1.99 a kilo.
And all this cause 2 soldiers got kidnapped.
What I think will happen is...
Nothing it will stay as it is, slowly after Israel has taken out most Hizbollah targets they will stop it will be over and then the cylce of voilence in the ME can get back to normal.
And they won't find there soldiers.