Being an atheist is okay.
Being an atheist and shaming religion and spirituality as silly or not real is not okay.
Being a Christian is okay.
Being a homophobic, misogynistic, r.acist, or otherwise hateful person in the name of Christianity is not okay.
Being a reindeer is okay.
Bullying and exluding another reindeer because he has a shiny red nose is not okay.