I don’t really think escalation is a concern for Iran at this point. It’s pretty clear the US army is at the limit of what it’s able to do here. They can try put boots on the ground next, but that’s going to be a disaster for them. They could ultimately try using nukes, but I’m not sure even the US public would accept that. There are not that many options left. So, it makes perfect sense for Iran to start causing casualties to make this whole thing as costly as possible.