If the V-2 had been used to attack staging areas for the D-Day invasion, etc., it might have been effective. But randomly blowing up a building here and there a

If the V-2 had been used to attack staging areas for the D-Day invasion, etc., it might have been effective. But randomly blowing up a building here and there accomplished nothing for the war effort. The Allies' bombing attacks on German homes had similarly useless effects. See "Fire and Fury" by Hansen. For a fascinating book on the development of the V-2, see "V-2" by Dornberger.