One of the Watchtower Societies teachings that is vastly different from Christianity is that only the 144,000 will be "immortal" while all other Jehovahs Witnesses will have "Everlasting Life".
What is the difference you ask? According to the Watchtower Society Immortal means that one cannot die... it is impossible to die and one will continue living for all eternity. Everlasting Life, on the other had, means that Jehover is keeping you alive so long as you are loyal and obedient to him. Simply put, everyone but the 144,000 most certainly CAN die and will never reach the point of Immortality.
What does this mean? If Jehover's creation is intended to last forever, as is implied by the Immortal 144,000 who cannot die or be destroyed, it means that it is just a matter of time before one of the others with Everlasting Life slips up and pisses off Jehover resulting in his/her death.
Now, expand this out over an eternity... just how long do you think a person with Everlasting Life can go without pissing off Jehover? 1000 Years? 1,000,000 Years? 1,000,000,000,000,000,000,000,000,000,000,000,000 Years?
My point is that it is just a matter of time before each and every individual with Everlasting Life screws up and is killed by Jehover. It would be absurd to believe otherwise because that would mean that these people are, by definition, Immortal.
The promise of "eternal life in paradise" is a FARSE... a LIE. Even if what they say about living on earth in paradise is true, it is just a matter of time before each and every person slips up and is killed by Jehover resulting in everyone, other than the 144,000, being killed by Jehover.