ohhhhhhhhh brother.. that would take ages.. discussing these. They say all three beleive in the one god but I dont beleive that as Christianity beleives in Jesus as if he himself was god as well.. so I think only Islam and Judaism beleive in the one god. I think Judaism and Islam are much closer religions and have more in common in as far as practices go: see Halal/Kosher, Circumcision, words that are offshoots of eachother from Hebrew and Arabic.. etc etc etc......................