Lets assume that you are right and that G-d truly is One. What type of relationship do you have with your G-d? Do you realy think or imagine that all that He really desires for you to do is to go around ranting and raving about this whole idea that He is One?
The problem with JWs is that they have made an idol out of their teaching. They believe that they have to fervently do meaningless works like correct everybody else. Find me some who a actually feed the poor or visit anyone in prison or whom is sick. Do
you do any of these things?
If not, your faith without works wont help you. G-d is not impressed with you defending His Oneness. It is not enough.
Peace