I think it's much more likely that they would strike back at a regional ally if anything. Keeping some of their cards hidden and not risking a unifying shock to the US populace
Destroy the infidels? Of course it doesn't exactly help anyone, but at least that's what their leadership keeps telling Iranians.
https://nolabels.org/the-latest/irans-leaders-still-hate-ame...
"The BND stated that these expenditures are being used not only to sustain the ongoing war in Ukraine but also to expand Russia’s sub-threshold operations against countries on NATO’s eastern flank."
https://defence24.com/armed-forces/half-of-the-defence-budge...