The one scriptural passage that unlocks the mess that the Watchtower tries to make of a beautiful offer of God is Mathew 26: 27, 28
From the NWT:
"And taking a cup, he offered thanks and gave it to them, saying: “Drink out of it, all of you, for this means my ‘blood of the covenant,’ which is to be poured out in behalf of many for forgiveness of sins."
Here you have Jesus (1) offering the cup to everyone, which is (2) a symbol of his blood sealed covenant to (3) forgive sins of the covenant members. This is what makes a person clean, the life of Jesus for yours ("the just for the unjust"-1 Peter 3:18)...... and not by their works, "lest any man should boast". The blood covenant washes a person and makes them white like snow before a court of law even though their sins be crimson.
NOW, lets look at the condition of the "Great Crowd". Are they declared righteous by the "benefits" they receive by being in association with the Watchtower corporation? Noooooooooooooo
From NWT:
Rev. 7 After this I saw, and look! a great crowd, which no man was able to number, out of all nations ........ “These are the ones who come out of the great tribulation, and they have washed their robes and made them white in the blood of the Lamb
The great crowd of tribulation saints get declared righteous the EXACT same way EVERYBODY previously did .... the blood of the lamb, only accessible by THE COVENANT. This is the ONLY deal offered mankind in the New Testament (Covenant) Scriptures. Destinations, functions, rewards may differ....but the mechanism for avoiding judgment is the SAME.
This is the true pupose of the WT, to prohibit the blood covering of Christ so that members are not declared righteous but must face judgment for their own sins at the Great White Throne. No one survives this judgment. Everyone gets judged, either vicariously (with a free pass) or in person....the choice is yours.
Satan knows that Judgment where he himself is headed and there is no savior for him. He wants to take the children of Adam, that he so jealously hates, with him.