What i find hard to grasp is that, out of the immensity of the universe, why would it's creator focus on a small speck of dust like the earth, with its different religions?

 I've tried considering this, just in our solar system itself, we're pretty small and insignificant already. Then there probably are billions of solar systems within the milky way. Then there probably are billions of galaxies that compose just the known observable universe.

Out of the immensity of this, i find it hard to comprehend that someone who created all these would spend time singling and sorting out humans for their beliefs and assigning them to a heaven or hell.

I mean, do other living organisms on other parts of the universe have their own jesus' and mohammeds?

The way i see it, it's really pretty petty arguing which religion is right or which is wrong when all these vastness is laid upon you. The universe is not here for us. Instead of killing each other about which god is the right god, having petty arguments that no one really will win, we should just look after each other.