Sounds good to me, however, isn't this story an 'urban legend'?
Unfortunately, not much documentation in favor:
"We haven't eliminated ruling out the possibility that Pershing at some point chose to deal with a group of 'Mohammedan fanatics' in a manner similar to the one described above, but so far all we've turned up are several different accounts and nothing that documents Pershing's involvement."
http://www.snopes.com/rumors/pershing.htm
Another source:
http://urbanlegends.about.com/library/bl_black_jack_pershing.htm
On a related note, "Infidel's Revenge":
http://www.susbloodlabs.com/