How would you reply to someone who has your steadfast belief not in Christ, but in Allah? You know from your reading and life experience that Christ is the saviour, he knows from his reading and life that Muhammad and Allah are.
Christianity is only represented by 33% of the population. There is twice as many people who do not believe what you believe. And they don't believe it with as much (or more) vigour as your belief for it.
As for atheists hating God, that would be akin to asking a Christian if he hates Zeus, Thor or Allah.
