I think it's more than Iran is being seen as the destabilising force in the whole region / world rather than anything to do with Russia.
The Gulf is a key US strategic point - because oil - Trump is committed to the continued use of it so needs to protect US interests long term.
Iran has been and continues to aid and assist trouble in various nearby countries - Iraq, Israel, Syria, Lebanon, Yemen etc. All of which ultimately pose a threat to the US interests.
Any chance whatsoever of it ever being able to develop military capability beyond what it has is problematic. And it's not just about nuclear. If it can supply drones to Russia, where next? Remember all those drone incursions we've been seeing near Western airports in recent months? It raises some bloody big security related questions which I don't honestly think the media has really looked at hard enough in terms of implications. This is actually far more of an immediate concern than other possibilities which draw headlines. Indeed drones being flown at UAE etc kind of highlights the point.
The US has a deal with Ukraine with resources and is desperate for a deal with Russia. Iran being unable to supply Russia takes pressure off the US to supply Ukraine and makes a settlement more likely there too. So the US can get those mining resources. The US wants out of Ukraine. It doesn't want a proxy anything with Russia.
Also see Trump's moves with Greenland. It's all about long term control of key finite resources as demand increases and supply reduces. (It's basically the underlying plot to a Bond Movie - but that's based on real world concerns)
Tbh I don't know how I feel about any of it or the rights / wrongs of the attack on Iran itself. I think we will never know if it was the right thing or wrong thing because we don't have a crystal ball and there are significant possibilities that could have / might arise either way.
We are now in a position where what's done is now. There's no point in seeing it in any other way.
My concern is about a political vacuum in Iran and what that now means. There really doesn't seem to be an on the ground strategy apart from let the Iranians get on with it.
That's going to raise so many issues in its own right. Whilst the US and Israel may feel they can take out the Iranian guard to an extent they are still armed whilst the people aren't.
Tehran has had massive issues with a lack of water in the last few months due to a lack of rainfall and very low reserves in the reservoirs. A large scale bombing campaign of the city is only going to make such infrastructure issues of basic essentials worse. There's going to be a lot of people who will ultimately flee the city to god knows where and god knows what regardless of 'which side' they might ultimately belong to. It's inevitable. A refugee crisis looms either way even without the prospect of a potential civil war. And that's frightening in its own right in terms of what might happen to those people. A lot of borders will be firmly closed. Others will be possible but only to areas which are dangerous in their own right and potentially pose a Western threat. And this doesn't solve water and food related issues for Iranians caught up in the mess.
It really isn't a resolution either way. All it is, is a weakening of a state level threat. It's a calculated degrading of a perceived threat but it's not an elimination of a threat. It's a threat that's going to exist in a different form now. Whether thats better or worse than the future in parallel alternative parallel dimensions is frankly irrelevant and not even worth the effort of thinking about.
What's done is done. We will need solutions to the problems there now are rather speculation on ifs and buts and maybes regardless of how we feel about any of it.
No one has the capability to stop Trump / Netanyhu on this. The Washington Post reported over the weekend that publicly the Saudis are against it but privately the Crown Prince had actively asked for the US to crack on. Whether that true remains to be seen but it raises questions about just who wanted this action (and more importantly who wants to be seen to be supporting the action). Ultimately though no one else has enough influence nor leverage to stop it at this point either including China and Russia even working with anyone else. It's about a shift from Consensus Diplomacy to Authoritarian Style Leadership within world politics which Trump has favoured for a long time.
None of us have much choice but just see what happens over the next few days, weeks, months and years.