This is a one shot attack. They will never be able to do it again. And I don't think most of the world has pissed off Mossad quite as much as Hezbollah. Assuming they even did it!
>> This is the second time israel has done this https://en.wikipedia.org/wiki/Yahya_Ayyash
Only if Hezbollah take steps to avoid it. Presumably they will, but presumably there is a cost, and so Israel will continue to benefit from them having to divert resources to doing that.