Here are some resources that can help you understand the issue and what the Bible actually says. 

There’s a movement among Christians today towards what’s called Christian Universalism. It’s a belief that everybody ultimately will be saved—there will be no Hell, or at some point Hell will be depopulated and everyone will live forever with Christ in Heaven.

Universalism: the belief that everyone will eventually go to Heaven.

In his article, "Is God a Monster?", Tommy Clayton puts his finger on the unpopular doctrine of Hell.

Recently I’ve been going back over hundreds of pages of notes and quotations that I compiled over years of research, but have never used in any of my books on Heaven. I came across this one from Spiros Zodhiates, taking from his book Life After Death.

This is my third and possibly last blog on this subject. But given its importance to the gospel of Christ and the health of Christ’s body, I make no promises.

Universalism originated in the Garden of Eden when Satan said ‘you will not surely die’ (Gen. 3:4). The appeal by Universalists to God’s desire to save all is unconvincing because the same God who reveals that He desires for everyone to be saved also reveals that not everyone is saved. Additionally, we must distinguish between God’s sovereign will (which God infallibly brings to pass in the world), and His permissive will (what He does not want in and of itself, but wills to occur in light of all of history considered together).