The military has many places to train. There are places to shoot. There are places to blow things up. There are places to maneuver tanks. There are few places which include a civilian population.
That event was a training event for parts of SOF community; a community which is operating in over 100 countries at any given time. Very few of those countries are in active conflict... by that I'm referring to a shooting-war. These types of units must be prepared to perform their tasks in a peaceful environment without undue notice. Units are typically small; think less than 15 people with maybe 2-3 civilian-style vehicles. They operate dispersed over large areas. They don't have tanks. When such units move around, they are usually in non-military vehicles and attire. For this kind of unit many tasks are related to interacting with people, either local security forces (police and military) or local civilians. There is a legitimate need to train on such tasks.
These types of training events focus on the military tasks which need this kind of a training environment (large area, dispersed operations, civilian population). Training for tasks related to shooting and blowing things up happen in areas the military 'owns.'
I highly doubt any of the training plans included detonations, live-fire, or even dry-fire events anywhere outside the normal military training areas. It's more likely that the interactions with the actual civilian population would have been completely un-noticed. An interaction would more likely look like a strangely fit group of guys were putting fuel in their Toyota and then drove away... maybe making a few jokes with you while you both wait at the pump. Almost certainly the same (or less) level of impact as your average Reserve or National Guard unit driving around on a weekend.