After all the two witnesses are there to do what...preach with power and to use the power of God as they will to correct the nations and to blunt the connivance of the beast system? They are there as well to bring a sense of hope to those suffering for Christ on the earth at the time and to be a witness for God!(God always provides a witness for himself!)
So far about 500 teenage Christian girls have been beheaded, set on fire, drowned because they refuse to convert to Islam.
You think we will excape our trail by fire, I think not.