in my opinion it is just an emotional issue

Some people believe in God just because they feel the presence of lord around them.Some others the direct opposite

I dont think that it is possible to turn a believer into an atheist or the other way round just using rational arguments

After all the discussions also in this forum nobody has ever changed his mind

This is true in the short \ medium run, I mean 1 or 2 generations

an other matter in the long run
If people , in general, are nowadays less religious than in the past it is due to the fact that science has razed to the ground many ( not all ) mile stones of religion