If you really think that, it's probably time to get on a plane and do some traveling. No need to reference an old book - go see the world for yourself.
So: because you don't know something you'll travel the all World?
It is 2015: Internet do exists.
It's not that you don't know something. But a statement as ignorant as "Atheists cannot love" can't be resolved through words. That is a very bold statement that and you must live in a very small world to think it to be true. Love is a human emotion, that is not conditional on any religious belief.
And I do think traveling is one of the best ways to rid ourselves of ignorance. The internet is a great tool as well of course, but it is no replacement for traveling.