I suppose the decisionmaker needs to know what societal values one has to uphold, and in which order of importance. As a wild example, if the group had demanded the women walk around in the nude, because of their religion, it'd be obvious to say no because it'd violate so many of the employees' values.
And the Elites tut tut at people voting AfD and Le Pen.
These %$%#@& are fuelling the far right.
Facepalm!
What if the Hindus had said "we are vegans, please don't serve us meat" - probably reasonable enough, although I seem to recall some rightwingers getting angry about some other occasion where only vegetarian food was to be served.
Yeah, as a host I'd be fine with meeting their dietary restrictions; but would refuse their with staff gender restrictions. Somehow the management company didn't know where this acceptability border lied.