Mat 24 says that the good news of the kingdom will be preached before the end.
Jws take that command to mean to preach the "kingdom of 1914. " they sing that in their songs. The "kingdom reality" , it rules now.
they do not mean Col 1, the kingdom of the son, love,
To them, the 1000 year rule is a mere continuation of what started in 1914. and then
There is going to be another transition, when the kingdom is beeng handed back to the source ~ 1055 years from now.