Why do non-religious people think that religious people live in fool's paradise?

Re: Why do non-religious people think that religious people live in fool’s paradise?

If a Muslim preaches to another Muslim or Christian fellow, this should not bother nonreligious people. what you say?
If a muslim preaches to an atheist even then criticism would not be the case. although preaching by muslim to atheists is unlikely as we are not spiritually trained enough.