We clearly have differing theological views on what constitutes blasphemy and specifically in which cases it may be considered unforgivable. I am fine with my use of the term, for this case.
My dict.cc says blasphemy is meant in the sense of
oath [curse, imprecation]
ban [archaic] [curse, malediction]
whammy [Am.] [coll.] [curse]
(bad) mojo [Am.]