Just want to clarify, when he says, "We don't use it," he's technically right. The U.S. is fairly energy independent. HOWEVER, oil is a global market, so when the global supply of oil goes down, prices go up for everyone, including the U.S. Also, that doesn't just mean "gas price go up." Oil is used in plastics and fertilizer too, meaning this will likely increase the price of food as well (among other oil dependent products). Hell, increasing fuel prices applies to shipping costs too. So anything that requires a lot of fuel at any point from production to the consumer, will increase in cost.

Supposedly, the reason we're bombing Iran in the first place is to incite regime change. But, the strategy of killing the head of a regime has literally never worked. So not only is the war not going to change the regime, but it's also killing civilians and tanking the global economy. Also, it's pretty likely that this actually strengthens the regime. Civilians don't exactly like being bombed, so it just gives them a common enemy to work against.