LWT I would say early Christianity is a better match for Lifton's criteria than Jehovah's Witnesses, therefore it would be ironic for other Christian groups to use that as a basis for labelling Jehovah's Witnesses as outside the mainstream. Just to go through some of them:
The most basic feature is the control of human communication within an environment
2 Cor 6: 14 Do not become unevenly yoked with unbelievers. For what fellowship do righteousness and lawlessness have? Or what sharing does light have with darkness?
Mark 10: 29 Jesus said: “Truly I say to YOU men, No one has left house or brothers or sisters or mother or father or children or fields for my sake and for the sake of the good news 30 who will not get a hundredfold now in this period of time, houses and brothers and sisters and mothers and children and fields, with persecutions, and in the coming system of things everlasting life.
If the control is extremely intense, it becomes internalized control -- an attempt to manage an individual's inner communication
Romans 12: 2 And quit being fashioned after this system of things, but be transformed by making YOUR mind over, that YOU may prove to yourselves the good and acceptable and perfect will of God.
Control over all a person sees, hears, reads, writes (information control) creates conflicts in respect to individual autonomy1 Cor 1: 19 For it is written: “I will make the wisdom of the wise [men] perish, and the intelligence of the intellectual [men] I will shove aside.” 20 Where is the wise man? Where the scribe? Where the debater of this system of things? Did not God make the wisdom of the world foolish?
Gal 1: 8 However, even if we or an angel out of heaven were to declare to YOU as good news something beyond what we declared to YOU as good news, let him be accursed. 9 As we have said above, I also now say again, Whoever it is that is declaring to YOU as good news something beyond what YOU accepted, let him be accursed.
Groups express this in several ways: Group process, isolation from other people, psychological pressure, geographical distance or unavailable transportation, sometimes physical pressure
1 Cor 15: 33 Do not be misled. Bad associations spoil useful habits. 34 Wake up to soberness in a righteous way and do not practice sin, for some are without knowledge of God. I am speaking to move YOU to shame.
Luke 5: 8 Seeing this, Simon Peter fell down at the knees of Jesus, saying: “Depart from me, because I am a sinful man, Lord.” 9 For at the catch of fish which they took up astonishment overwhelmed him and all those with him, 10 and likewise both James and John, Zeb´e·dee’s sons, who were sharers with Simon. But Jesus said to Simon: “Stop being afraid. From now on you will be catching men alive.” 11 So they brought the boats back to land, and abandoned everything and followed him.
Matt 12: 30 He that is not on my side is against me, and he that does not gather with me scatters.
Often a sequence of events, such as seminars, lectures, group encounters, which become increasingly intense and increasingly isolated, making it extremely difficult--both physically and psychologically--for one to leave
Heb 10: 23 Let us hold fast the public declaration of our hope without wavering, for he is faithful that promised. 24 And let us consider one another to incite to love and fine works, 25 not forsaking the gathering of ourselves together, as some have the custom, but encouraging one another, and all the more so as YOU behold the day drawing near.
2 Cor 6: 16 And what agreement does God’s temple have with idols? For we are a temple of a living God; just as God said: “I shall reside among them and walk among [them], and I shall be their God, and they will be my people.” 17 “‘Therefore get out from among them, and separate yourselves,’ says Jehovah, ‘and quit touching the unclean thing’”; “‘and I will take YOU in.’”
Sets up a sense of antagonism with the outside world; it's "us against them"
1 John 4: 4 Y OU originate with God, little children, and YOU have conquered those [persons], because he that is in union with YOU is greater than he that is in union with the world. 5 They originate with the world; that is why they speak [what proceeds] from the world and the world listens to them. 6 We originate with God. He that gains the knowledge of God listens to us;he that does not originate with God does not listen to us . This is how we take note of the inspired expression of truth and the inspired expression of error.. This is how we take note of the inspired expression of truth and the inspired expression of error.
Closely connected to the process of individual change (of personality)Eph 4: 20 But YOU did not learn the Christ to be so, 21 provided, indeed, that YOU heard him and were taught by means of him, just as truth is in Jesus, 22 that YOU should put away the old personality which conforms to YOUR former course of conduct and which is being corrupted according to his deceptive desires; 23 but that YOU should be made new in the force actuating YOUR mind, 24 and should put on the new personality which was created according to God’s will in true righteousness and loyalty.