It is not that only believers are close-minded; there are lots of atheists and non-believers who are close-minded as well. I will give just one example here.
In one YouTube channel presentation someone argued that God does not exist, because God is neither in space nor in time. For him in order to exist someone or something must have to be in space and time. In reply I wrote to him that there is an instance in nature that something can still exist even if it is neither in space nor in time. In SR it has been shown that both the travel distance and the travel time become zero for light. So long SR is not replaced by some other better theory, we will have to accept that its mathematical equations are correct and that therefore whatever conclusions can be drawn from these equations are also correct.
So as per SR a photon originating in a distant star and coming towards earth will be neither in space nor in time during its total transition period, which may be anything, even billions of years, depending on the distance of the star from the earth. But due to this reason that light is neither in space nor in time during the transition we cannot say that light does not exist, because we can see the star. Twice my comment was deleted. So I posted it for the third time and then only it was answered. The reply was that the mathematics of SR is wrong, because it contradicts our observation. As we can see the light, so it must be in some space-time. So I had to write to him that If he had any new theory that could replace SR, then he should present it to the peers and get it accepted. This comment was also deleted.
So I cannot accept that only believers are close-minded; non-believers can also be close-minded.