If we can't carry our religion on our space mission, then you would soon extend this to any workplace.
I think it is a personal choice and I think some people should learn how to use their "religion" appropriately.
I think you are boarding on hampering a Human Right here, to not be discriminated against for any purpose, and I know the irony. I get it - some religions are very alienating in their dealings of others.
I don't think we should start making such hard and fast choices.