How do you determine right from wrong
Christians pretend to determine it by reference to god's words and actions. This leaves them having to approve of slavery, kidnap, rape and infanticide.
Morality by divine fiat is no morality at all.
In reality they mostly get their morals in the same way as unbelievers. From approving those things that promote the well being of conscious creatures. Then they superimpose god-talk over the top of that which leads to impossible contradictions. Socrates saw the dilemma when he posed is famous dilemma to Euthyphro.