Lots of people, including more than a few Christians, don't want to think about hell, don't want to stray beyond the "kind and merciful" God idea, don't want to admit there might be a place that would "distress" them. Denial.
We all know these "deniers". It's the ostrich thing... head in the sand, I'm SAFE! Sounds like more than a few of my neighbors.
When I discovered God the first thing He showed me was His TRUTH... how everything comes thru that! Everything. So it's pretty sad that the thing God holds essential in all things is poo-pooed by so many.
Maturity in Christ won't come at all until Truth (and the acceptence of same) becomes an very really part of your life. As for those who won't believe what God tells them... little difference between now and two thousand years ago. But we keep at it!
His,
Rev J