I am not religious myself, but I'd hardly say "rubbish".

For many people it is a real source of consolation, of joy, of reassurance, of strength, and other good mental and emotional things. So hardly "rubbish".

On the other hand, for millennia religion--or should I say extreme religionists--has/have been the source of much of the world's evil, much as you referred to in your examples. Even on this negative side, I would not use your word "rubbish", because that trivializes the negative.

Dave Oesterreich