Anyway, the pastor of my old non-demoninational church (years ago) preached that Mormons, Jehovah's Witnesses and Seventh Day Adventists were on a greased slide to hell.
Yuck...remind me not to go to that one.
God doesn't send anyone to hell/eternal death/or whatever you want to call it. People choose for themselves what they want to do with the evidence or lack of evidence given. Some don't think the evidence is compelling enough or it doesn't make sense to them, so they reject it. That's their right. Some come to a different conclusion (like JWs) and that's fine too.
As far as the Bible is concerned, it says that Jesus is the only way to life. You can accept that or not. The Bible is clear that those that do not accept Jesus will not receive life. (John 14:6)
Some people don't like that it is so exclusive. And that is their right.
I have come to the point in my life that I don't tell anyone that they are going to hell or not be resurrected. It's not my place. I've made my decision that I believe Jesus words and I believe what the Bible says,and personally I believe there is enough evidence for me to believe this.
That being said, I've thought about it over the years. Jehovah's Witnesses DO believe in Jesus. So is that enough? Or do they have to believe in the exact concept of Jesus as other Christians do? I don't remember reading anywhere that unless you believe Jesus is God, you will not be saved. I don't remember reading that if you think that Jesus was a created being that you will not be saved.
That ALSO being said, Paul did warn those not to follow after "another Jesus". Jesus also said that it is only by going directly to HIM that people could be saved, and Jehovah's Witnesses do not do this.
That is why the compelling evidence has caused me to not condemn anyone and say that they are going to hell. Or that they are damned. Or that they are whatever. I believe that it is my job to love everyone (Christians, Islamic, Atheist/Agnostic, Jew, etc...) regardless of their beliefs, and not take it upon myself (as many evangelicals do) to tell them "If you don't believe this specific thing, you are going to hell."