First, this letter was addressed to Christians in the first century who were all "born again" and anointed to be kings. None were of the "other sheep" with the earthly hope. Therefore, in the context of which this letter was written, all believers were "born of God."
However, we must be aware of different definitions of what it means to be "born again." Most people have been taught that being "born again" simply means taking on a new (Christian) life or accepting Jesus as our savior. So, according to *that* definition Witnesses could answer "Yes, all Witnesses are born again," since we must accept Christ as our Lord and Savior.
However, Witnesses are very careful to use Scriptural terms in their proper sense, so we would also mention that the Scriptural meaning was a little different and our belief must agree with that. In Scripture the term "born again" is *only* applied to those who have been "adopted" as sons of God and heirs with Christ for a resurrection to the heavens. They are said to be "God's children" in a *special* sense because of this new and special "adoption" to a heavenly life (1Pt.1:3- 4,18-19, 23; Rm.8:13-17; Heb.12:23). These are "bornagain" because their future is life in the heavenly realm rather than God's original earthly purpose for humankind. This was a new arrangement for humans put in effect only after Christ came to earth. (Jn.1:9-13; Jas. 1:17-18; 2Cor.5:17).
Those who have an earthly hope have no need for a "rebirth" to heavenly life. They are simply God's children in the same way Adam, Abraham and other pre-Christian humans were (Rm.8:19-22). They are dedicated to doing God's will *for them*-- which is to be faithful and fulfill God's original purpose for the earth (Gen.1:28; 2:15; Ps.37:29; Rev.21:3,4).
Similarly we have the contrast in Rom. 8:19-22 between the"son's of God" who are revealed and the "creation" who also are "children of God." Both groups will gain freedom from sin. (1Jn.3:2; 1Cor.15:48-49; Phil.3:20-21).
At the same time we know that things which are *specifically* addressed to, or stated about, those future heavenly kings can also refer in a *general* sense to those who will live on earth. John says in his letter that all those "born of God" must "love," must gain the "knowledge of God," "must not practice sin," and must "conquer the world" (1Jo 3:9; 4:7; 5:1,4; 5:18). Yet, all these things can be applied by extension to the "great crowd" since they have the same requirements for salvation and must "become one flock" (Jn.10:16).
While John was addressing only Christians with the heavenly hope, today all Christians can say that they are "born of God" in a general sense. Those with the earthly hope just are not "born of God" in the same sense that the 144,000 are. By the same token those who are of the 144,000 are not "born of God" in exactly the same sense that Christ is (cf. 1Jn. 5:1; 5:18).
Similarly, there are different references and nuances for the terms "sons of God." Jesus was a "son of God" yet so were the angels. Was Jesus a son of God in *exactly* the same sense as the angels? No, Jesus is the only one who is called God's "only-begotten" and "first-born." While the term "son" indicates that Jesus received his life from the "father," Christ is a "son of God" on a level far different from the angels or humans.
Jesus said God was his "father" yet God is said to be the "father" of humans. Was God "father" to humans in *exactly* the same sense as he was to Christ? No, again Jehovah is "father" to Christ in a greater sense.
Witnesses understand the different nuances between being “born again” and being “born of God.” So, unlike other religious writers who do not completely understand the Bible, you will find that our literature properly makes a differentiation when the Scriptures are using terms in technical ways and general statements.
Unlike other religions, we accept the strong Scriptural evidence of two groups of Christians both who gain salvation, one spoken of as a limited number who would be "born again" as kings in heaven and then a great multitude of subjects who "inherit the earth." Most religions ignore the explicit statements by Jesus and the Scriptures which show that most humans will enjoy everlasting life on earth (Mt.5:5; 6:10; Ps.37,9,10,29; Isa.66:19-24; 24:1-6; Rev.21:3,4; cf. Jn.3:13; Acts 2:34).