Israel would not be attacking Hezbollah if Hezbollah wasn't attacking Israel. Israel just wants to exist while Hamas, Hezbollah and Iran all want to destroy it. Don't expect Israel to just passively accept this. Try to imagine how the US would react to a Mexican cartel shooting rockets at El Paso. I couldn't feel sorry for that cartel when the US counterattacked.

Let me ask you a few questions

1) do you think Hamas, Hezbollah, and Iran can defeat Israel with force?

2) do you want them to?