What are some specific moral emotional and intellectual reason that people reject the Christian gospel?

Few people would reject the Christian gospel on moral grounds. Some would reject it on emotional grounds, for example after hearing of the predatory sexual behaviour of Catholic priests and other clergy. But by far, the most common reasons for rejecting the Christian gospel is that the Christian gospel is simply not believed.

Some who do not believe the Christian gospel do so because it conflicts with their own religious beliefs. This is just as rational as for a Christian not to believe in, say, the Hindu faith because it conflicts with his or her own religious beliefs.

Others reject the Christian gospel for intellectual reasons. They realise that there is no proof that God exists. They also realise that the Bible is far from infallible, with many inconsistencies and errors. Many simply do not believe in the truth of any religion, Christian or otherwise.