WHO ARE CHRISTS BROTHERS and SISTERS?

Matthew 12:50
Christ said,"anyone who does the will of my Father is the same my brother, sister and my mother."

Are you doing God's will? Then according to Jesus' words, you are one of Christ's
brothers or sisters.

A Watchtower doctrine which divide it's members is the teaching; on who are Christ's brothers.
It is taught that 144,000 are Christ's brothers or sisters and only they are redeemed(saved);Holy ones, faithful and discreet and that only these 144,000 belong to Christ. The rest of the millions of Jehovah's Witnesses do not belong to Christ, are not Holy ones, neither faithful or discreet, and are not redeemed, and that God did not give them the New Covenant.

The other sheep class are assured by the Watchtower, they are doing God's will,
yet they say this earthly class are not Christ's brothers nor do they belong to him.

Is this true or a lie?
Let us examine a few more scriptures to see whether or not the so called JW
'other sheep class' belong to Christ or not:
(John 13:3)
"Jesus knowing that the Father had given all things into his hands,
(John 16:15)
"All things that the Father has are mine".

(Matthew 24:45)
'Who then is a faithful and wise servant, whom his lord hath made ruler over his household, to give them meat in due season?
Did you notice they are 'his household'?
That denotes ownership.
1Peter 5:2-3
"Feed the 'flock of God' (ownership term) which is among you, taking the oversight thereof, not by constraint, but willingly; not for filthy lucre, but of a ready mind;
Neither as being lords over God's heritage, but being examples to the flock." Yes, THE FLOCK OF GOD!

a. Notice the household belongs to God.
b. the flock of God is not to be lorded over.
c. feed the flock of God willingly, not for money
d. they are 'God's heritance

Notice what is written in the scripture;
John 17:1-3
"even as you gave him authority over all flesh, that to all whom you have given him, he should give eternal life.
And this is life eternal, that they should know thee the only true God, and him whom thou didst send, even Jesus Christ."
(this shows that anyone who does not belong to Christ does not receive
everlasting life, but only those who belong to Christ)

The Watchtower quotes this scripture to the so called 'earthly class' as meaning
they get everlasting life, yet, the scripture clearly says those who get everlasting life, God gave to Christ.