The WTS is not Babylon the Great. Who is?
Matthew 23 describes the woes to scribes & Pharisees. In verse 34-35 Jesus explains how the blood of all the righteous slain from Abel to Zechariah comes to be upon their hands. The cross reference goes to Revelation 18:24, which describes Babylon the Great.
Pharisees were those who claimed to be true followers of Jah, but proved false to their claims. They were hypocrites. Likewise, the self professed annointed christians, including the Governing Body, and the "annointed remnant", these are the ones who are claiming to be true Christians but proving false to their claims.
They would rather ride the beast of their religion than serve God in spirit and truth. However Jah will put it in the heart of their golden calf "god", the Watchtower, who will turn on them and devour them.
The WTS will be thrown alive into the lake of fire. By this time all the good hearted people will have left, and it will be full of wickedness, worthy of everlasting destruction.
I wouldnt worry about the United Nations personally, they do more good for humans in a day than the WTS have ever done in their history.