Just about everyone has had at least one experience with the Jehovah's Witnesses knocking on their door. Think about your own experiences with them. Did you dismiss them? Did you ignore them? Or did you point them to the light of the true Jesus Christ of the Bible? Too often I think Christians treat the Jehovah's Witnesses spitefully, perceiving them as enemies they should have nothing to do with. But Jesus commanded us to love our enemies, and what better way to love someone than to give them the truth of the gospel? We must not forget that the Witnesses are lost without a true knowledge and saving faith in the true Lord Jesus Christ. Therefore we have a duty to give them a true witness just as we do for any other lost soul.
I have had the privilege of being able to witness to some JW's over the last few months. I'm amazed that they keep returning, but I thank God for every opportunity He gives me to share with them, and I pray that His Holy Spirit will convict them and bring them out of darkness and into the light. I'd like to share a little of what I've learned in this experience.
For now I just want to point out that the JW's (at least the new converts) do view the Bible as the inspired word of God (although they use a corrupt version - the New World Translation). However their false theology is given to them through the Watchtower organization. It's up to us to show them that what the Watchtower is teaching them is contrary to what the Bible actually says.
But as I said before, there are numerous doctrines that they are taught that are unbiblical. So where do we start? Well, as the late Dr. Walter Martin said, you can be right on every other doctrine in the Bible, but if you are wrong about your view of God, you will be lost for all eternity.
So in my opinion, it is best to start with the person and work of Jesus Christ. All cults and false religions have incorrect views about who Jesus Christ is or what He did for us -- usually both. We need to have a firm grasp on the fact that Jesus Christ is God incarnate and that He became an offering for sin (Isaiah 53:10) on the cross so that whosoever believes on His name will be born again and redeemed from the curse of the law (Galatians 3:13).
Later I hope to give some examples of scriptures we can use as a testimony of these facts. Below are some links to some helpful resources.