I have noticed that in the Old testament they did just this-they would say things like-'May God deal with me, be it ever so severely, if I do not accomplish this.' So it used to be OK to do this sort of thing but in the New Testament Jesus says that now if you do this it is from the evil one. This may explain why these curses are wrong.
I also find it so disturbing to find so much great christian stuff associated with freemasonry. It is a misuse of His name.