Foam is for fire supression, not damage.
A 727 without a nose gear wouldn't have very much damage no matter what. That airplane is so tail heavy that you can't taxi one without several thousand pounds of fuel onboard. The nose gear will lift right off the ground while trying to move it.
Look at the second video. The runway was most certainly not foamed ahead of time. They may have done it once in Alaska, but it was a waste of time, and foam if they did.
Runway foaming went out in 1987.
http://www.boeing.com/commercial/air...quirements.pdf
This is the PHX standard operating procedure.
http://phoenix.gov/fire/20513.pdf
and since we are talking about a crash in Germany, this very clearly states that no airports in Germany foam the runways because it is a waste of time.
http://www.economy-point.org/f/foam-carpet.html