Religions and cults expert, Ron Rhodes, gives this concise overview of some of the areas of disagreement between Christianity and Masonry. He writes, "Masons typically teach that the Bible is one of many holy books. They teach that Jesus is just one of many ways to the Supreme Being or the "Great Architect of the Universe" (but see John 14:6; Acts 4:12; 1 Timothy 2:5). They teach that God is known by many names—including Jehovah, Krishna, Buddha, and Allah. Masonry teaches a works-oriented system of salvation, which is a direct contradiction of salvation by grace (Ephesians 2:8-9). Further, they require every member to take oaths that no Christian in good conscience should ever take (such as admitting that they are in spiritual darkness and have come to the Masonic Lodge for light)." [Ron Rhodes, The Big Book of Bible Answers, p. 361). For more, see the resources below.
"Freemasonry" (Eight Areas of Incompatibility with Christianity) by the North American Mission Board
"The Masonic Lodge" by John Weldon