Jehovah witness can you tell me why?

We teach / preach the same gospel Jesus did. The theme of his preaching was God's Kingdom, and how it is the ONLY real solution to mankind's problems. Yes, we talk about war, crime, injustice, etc., but in the context that it fulfills the signs of the last days, that Jesus taught about, and that the end of this system is very close. We preach the same thing Jesus did. If you preach anything different, YOU preach a different and corrupt gospel.