Joseph was successfull, because God was with him.
I think the opposite is true also in this case here. God sends a severe warning to the wicked Iranian leadership.
But I don't think that Israel is behind every explosion there. Perhaps it is a mix of "perpetrators". The Iranians suffer under the sanctions and can not replace parts in time. Then you have normal human mistakes too. Also there are some domestic opposition groups. And of cause Israel is active too, they prove it on a weekly basis in Syria. And have done it before with Stuxnet in Iran.