You are right about that. Israel is going into Gaza that much seems sure. What will hezbullah do? It appears the US fleet is there to encourage them to do nothing.
I think this is to deter Syria and/or Iran.
Israel is not "massing" at Gaza. Relatively small punishing force.
U.S. fleet off Lebanese coast. Egypt pissed at AQ and Hamas. Syria wants to talk. Hezbullah trying to influence new Lebanon pres selection.
Hezbullah sits this out while IDF find solution to AQ in Gaza. - - IMO.
Now, what will Israel do to Hezbullah, that is a better question. I don't know. One front at a time.
Russian rustbucket in Syria is . . . well, just that.
yitbos