A. quote does not make sense
B. Its called dark ages because of plague and germanic tribes, if you think a religion cause 1000+ years of scientific stalling think again.
C. Polyphiesm and Monotheism are two very different things, if you read into the stories (which i know no atheist has the time read something unscientific so it wont matter) the stories are very very different.
D. Its a widely accepted fact that if you do morally good things and dont kill you will go to heaven.
E. Father, Son, Holy spirit are different but at the core they are the same.
F. Bible was translated (new testament was greek, old was in hebrew), James Peter and others were translated into english.
G. Christianity stemmed from judaism as did Islam, take ten seconds to google it.
H. thats pretty funny.