I suspect you are referring to people that don't believe in your religion. Let's pretend that's not what you are alluding to. Answer: many people go though a loss of dreams and doubt overtakes beliefs throughout their lives - it's part of the human condition. Some change their beliefs and others lose them permanently - while still others are able to recover at least some level of dreams of their future. Given the worst tragedies - humans have demonstrated incredible resilience in recovering - at least partially. Keep in mind that I'm talking about realistic dreams - if I dream that I will be able to flap my arms and fly in the future - that's not a dream - but a delusion.
I'm pretty sure it's impossible not to dream. And you might be misusing the word belief. If you wanted to know what I would think about someone who has no religious belief? I would say "Ah! Another sane individual with whom I can have actual conversations with. Most interesting!!" If you want to know what I think about a person who has no opinions (a secular definition of same word), I'd argue that that is most likely impossible as well.