Great article, these two paragraphs sum up the strategy nicely:

Rather, the attack was part of an effort to escalate Israel’s way out of a situation in which its declared objective of “destroying Hamas” is out of reach, the worldwide isolation of Israel because of its actions in Gaza is becoming undeniable, and even its habitually automatic U.S. backing has patently softened. For Netanyahu personally, escalating and expanding the war, insofar as this also means continuing it indefinitely, is also his only apparent hope for staving off his political and legal difficulties.

Escalation as an intended way for Israel to work its way out of the Gaza dead end has two elements. The main one is to provoke Iran to hit back, which can enable Israel to present itself as defending rather than offending and to push debate away from the destruction it is wreaking on Gaza and toward the need to protect itself against foreign enemies. The other element is to increase the chance of the United States getting directly involved in conflict with Iran. If it does, war in the Middle East would be seen as not just a matter of Israel bashing Palestinians but instead would involve equities of Israel’s superpower patron.