Why are ther no windows in the JW hall? I’ve always wondered about that.As a former JW for most of my childhood life I can tell you they are so far from Christian its not even funny.
They do not believe in the Tri-une Godhead and have altered their Bible to reflect purely Arian views of Christ which erases all evidence of his divinity.
They believe Jesus Christ is not God in the flesh but a creation that God (The Father) created to create everything else. Thus he is not the eternal Son.
They believe Jesus died on a "torture stake" not a cross, and do not believe he rose from the grave with his body (They believe he rose as a spirit only so this here absolutely excludes them from the biblical Gospel)
They do not believe in a physical second coming of Jesus.
They believe he came back invisibly in 1914 to reign in heaven and will save all Jehovah's Witnesses during Armageddon invisibly.
They believe only 144,000 "Anointed" Jehovah's Witnesses will go to heaven and the rest are the "Great Crowd" who will survive Armageddon and get to clean up the earth to live happily ever after forever.
They believe in a second chance for non-JW's and they will be resurrected or rather reanimated (Soul Sleep) during the millennial reign of Christ.
Only the original 144,000 (who keep getting replaced/rejected) are the only ones worthy to take the cup and the wine at communion, which they call the Lord's evening meal and the rest of the JW's simply pass the bread and the wine.
They do not believe in hell.
They believe that you must sacrifice for Jehovah in order to continue in salvation and "spiritual health" by knocking on door's, quitting forms of higher education to give more time for service to Jehovah, "pioneering" for 70+hrs per month. Meeting or exceeding a number of placed tracts, watchtowers, and return visits (They use James famous faith without works line to justify all this here)
When you are guilty of a sin you are shunned and ex-communicated from the religion, which includes family and friends Even if you're dying they will not answer your call. (This is Jehovah's way of disciplining you) Until the Elders determine you're sorry enough. Then you can join in on meetings but have to sit as far back as possible as not to fellowship with anyone... then after some time passes a judicial committee of elders will re-instate you if you've been good enough.
Thats all I can think of at the moment.