Why not have both, and 50 years ago, no less?:
It is a magnificent testimony to the evolution of humankind
If Dr. Buzz Aldrin can: and he's a Conservative Christian, what's your excuse, o OP...?!
And - soon after landing the LEM 'Eagle' on the Sea of Tranquility - he conducted the first religious ceremony: taking Communion, on another world. Ergo, not the Earth and the cross.
To quote another space explorer - Capt. Jean-Luc Picard - 'There are always other options'.