I don't think they all say that, otherwise what would be the point of hell?
Hell and Heaven are defining points. It's impossible to have a scale with one point only.
Also, there is such thing as apocatastasis. It's another proof that we will all be in Heaven, even Satan.
I'm pretty sure I've read rants by the Westboro Baptist Church promising Hell for gays and unbelievers. Are you saying they're wrong? And if they are wrong, how do you decide which Christian sect is correct?
Ok so you might be happier about Hell for Pedofiles or mass murderers? Firstly Hell is debated by believers but generally you might want to avoid it even if it is just eternal separation from God and knowing you could of been with him.
No as a Believer all men have fallen from the perfection of God. So gays, pedofiles, murderers are all welcome in Heaven if they repent and believe. No sin I believe will condem you but also even believers will be judged for the good they did. Trust me God is way more gracious than humans ever could be. We are the first to bay for blood when we are wronged. God came as a man to earth, I think that shows his compassion and desire to bring all men to himself.