How do you know those people feel nothing? Do you know that for sure? The reasons for those actions could’ve been the reason of them feeling something, you’re an atheist right? You wanna know the truth about Christianity? none of us are deserving of God’s grace we are all bad people because of our pride and arrogance we have against him, he gave it to us out of his love and grace for us even if we didn’t deserve it, So what your basically saying is because we didn’t follow up to God’s rules and were misguided out of our own independence, we are therefore seen as bad people who deserve eternal suffering, that’s what a fundamentalist is, you don’t even have to be a Christian, it could just be someone who judges only by their actions and are strict to a set of rules