The biblical facts state that they will prophesy in Jerusalem (“the city where our Lord was crucified”) for 1,260 days, be killed, resurrected back to life, and raptured to heaven. Interpretive assumptions deal with the timing of these events, the identity of the two witnesses, the nature of the celebration that follows their death, and whether their resurrections and raptures are literal or figurative.
I believe they are taking statements as "fact" which is problematic. Also, note that the authors fail to think that the two witnesses themselves might be figurative, or that the timeline is figurative.
