There will no big war between Iran and USA, that is for sure. USA is in no position to take the risk for another big war in the Middle East.
Certainly, the bolded (my emphasis) isn't true at all. Remember it was the US that attacked and killed the Iranian security chief first? If the US weren't prepared for war she wouldn't have hit Iran first. I believe knows it's at a disadvantaged position here with the US. So, she's going to concede that to the US and eat the humble pie.