You will not win your arguments with superficial applying of the Scriptures to the Watchtower .
Matthew 24.45 states that there will be a faithful servant that has his sheep to feed in the end-times !
Just like a sheperd has a total control over his flock and cares about it we must identify such organization today that fits the description.And the only one I see fitting this is the Jehovah's Witness organization.You will not find a replacement to that : the other christian organization. If there is none ,then ,we don't have the end-times yet .
Luke 9.49-50 states about two categories of end-time servants :
-one small group of servants united in one body and one seperate indepenedent servant and these two must be identified before the end of the world can take place .
That one single servant cannot establish another competing organization and those who share his views can be indpendent as well.
If you are not sharing views of any of these two that God Yahweh uses in His End-Time Salvation Plan you are in bad situation.
Note that all of the class of 144000 represent Christ and there few of them and you need to search this out but it is a very difficult process . So many take an easy route and don't bother to do that.
False Messiahs and false prophets are among main-stream religions where many were deceived .
Popes claim to be like Christ and clergymen who are priests .
True priests : 144000 represent the body of Christ - these are true messiahs- Obadiah 1.21.
You have to find out we are in the end-time era and then find who is approved of God Yahweh by dates in the timetable and then those opposing the true servants who teach falsehood to nations are false messiahs ,saviors,prophets-Matthew 24.11 speaks about many deceived .It cannot be in Jehovah's Witness organization but in the whole christendom that is against Jehovah's Witnesses .
My posts give ample proofs where there are false prophets today .
Christ came spiritually in the end-times through his true servants but that is usurped by the popes and priests who are many .
Luke 21.28 is not against any Jehovah's Witness .Once we find they are the best christian religious organization - which they really are - the Scripture cannot be against them.