Are you contending that the air war is actually likely to bring an end to that regime? I'm skeptical. Killing individuals, sure, but that happens all the time in war without systems wholesale collapsing.
And honestly, no, I don't think it would be 'biblical in scale'. the Iranian people took a shitkicking back in January. It was awful. But you're engaging in some hyperbole here. Not to be 'that guy', but five figure deaths is unfortunately not super remarkable on the level of global conflict. That's like a month or two in Ukriane. The Iranian regime will no doubt continue to be absolutely heinous, but let's not pretend it's something it's not; this isn't the end times. As totalitarian regimes go they're fairly par for the course. I'm not excusing anything they've done or saying anything about the situation the Iranian people face is OK, but we need to be super friggin' pragmatic about reality on the ground, and what the U.S. and Israel both can accomplish, and what they can't. We don't know for sure what either is now, but we have to be rational and we have to continuously reassess. This war could absolutely continue to make things worse still. U.S. and Israel need to be clear about what their objectives are (do they each have the same objectives?) and if they in fact are achievable.