Why so many atheists, like Moloch, are constantly whining and acting so fearfully? It's like they are scared all the time

On the other hand, it is the hardcore Christians, who are acting fearfully. For example, many of my friends have asked me to convert to Christianity. Their argument is that if I don't accept Jesus as my savior, then I will face the eternal hell-fire after my death. Christianity is a religion which is based on blackmail and fear.
Everyone has fear of the unknown. Anyone who thinks that he knows the future finds out differently sooner or later. The fear comes when people suddenly run into trouble because the future doesn't play out the way their visualization of it suggested it should.