But the US not getting into direct action against Iran does not mean they are not part of all this. Israel is like its proxy and I do not believe that Israel just decides on its own to make big military decisions that would cause chaos in the middle eastern region.
I doubt they (the US) are in any way involved with Israel to cause the war, the thing is, both Israel and Iran have been enemies for a long time and have always have this disagreement and intentions to bomb and destroy each others one day. So, it's not new and I don't think I believe that US is secretly involved or do you have any source that put up a convincing facts that this is true?
They are the biggest ally of Israel, and so if country like Pakistan sided with Iran and most likely they could have been already, the US will have to go and support Israel. And as if they haven't support Israel in every wars.
However, as far as betting goes, I don't know, but I will stir away from such. I'm more of a sports bettors, and with that I don't like the geo-politics or it could have been my morals is against it.
Well, I do know am not going to bet on this kind of event too because I feel it's bad to bet on the predicament of others when they are not finding the situation funny themselves because life are being lost, properties destroyed and many disadvantages. Just like you, sport betting is already enough for me to bet on and have fun.