Did you not read the bits in your link about how there is little evidence to back up the assertion that Pershing ordered dead muslim insurgents be buried with pigskins? They also mentioned that when Israeli settlers claimed to have buried a dead Palestinian terrorist in pigskin, a spokesman for the organisation that sent him said that the settlers ‘don’t hold the keys to paradise’.
It also pointed out that the 9/11 terrorists committed a multitude of Islamic sins prior to the hijacking, including drinking and visiting a strip club, in the belief that what they were about to do would ‘wipe the slate clean’ with Allah.
Lastly, it pointed out that dead martyrs under Islam are not washed before burial, in the belief that their deeds have already purified them and it is therefore not neccessary, meaning that any defilement of a jihadi Muslim corpse by enemy infidels will have no bearing on whether he will get into paradise or not.
The link you posted is providing evidence of the exact opposite of what you are trying to say would be an effective means of deterring Islamic terrorists.
For my part, I believe this sort of thing might well deter some of the lesser educated and more medievally credulous terrorists, but certainly not the more hard-core religiously educated ones...