"Was Bishop Desmond Tutu 'coping out' when he invoked the Gospel in opposition to apartheid?"

As a man of religion, Tutu was simply doing his job.

But I'd say anyone who believes an argument against apartheid actually *requires* invoking the Christian gospel, is indeed as Amos say's 'copping out' of making an otherwise well reasoned argument.

An argument against an inhumanitarian practice, shouldn't require any superhuman basis.