First of all, speeding cars that crash sometimes explode. Without other evidence, you can't attribute it to a bomb, although the damage I saw pictures of was fairly extensive, but still, can can the know the motives of the now crispy critters?
Secondly “leave you cars and walk back while we check them for explosives”? So, they would send a possible terrorist away while they “checked the cars”?
This is just typical after-the-fact FBI terrorizing the public. They pretend they are doing something after the incident is over that they completely missed.
This is stupid on parade.
The damage looked more extensive than you’d expect from just a car crashing into the place. But it looked less extensive than you’d expect from a bomb. Maybe it was a poorly constructed bomb?