But at the same time, this war may have allowed IRGC to dig in. They've replaced a few people but the system may be stronger. Never mind that it doesn't even seem to be the administration's communicated goal to destroy IRGC in the first place.

On top of all that, they've threatened to reduce the entire country to the "stone age", and have started to target civilian industries.[0] If this campaign continues, how is this anything less than mass murder?

They're not doing this war for the reason you seem to want. They're not doing this to save Iranians.

[0] https://www.timesofisrael.com/israel-shifts-to-hitting-irans...

Second order consequences can be a real sonofabitch, and history has shown that to be doubly true in the Middle East