Thanks to Allah that you are safe!
If cars were built that strong and brakes were that good, I think the world would have been saved from road accidents forever. If you accelerate your car to 120 and expect that within the application of brake, the car will stop immediately, then you are wrong, since brake cannot help you in that situation!
In your case, as you know that the momentum greatly counts while you apply break, larger vehicles have more momentum, and hence require more distance to stop, and the same happened to the Civic!