Give it time, and in the meanwhile, just be kind and sincere. When the time is right to have further discussions, your interim kindness and sincerity will be exponentially valuable in dealing with the matter. Don't stir the pot, thus giving your parents cause to further accuse/abuse you. Be the bigger person in this - they'll see it and maybe even begin questioning how a 'godless' person can be so calm and respectful. Be patient, this is a process for everyone involved, and each will process how, and at what pace, they are best able.
