it seems obvious to me that they should have asked him to move.

in the end, it's perhaps a functionally trivial difference regarding who moves and who does not, but shifting the prerogative to the religious person places the burden of the social stigma on the person that is behaving in an anti-social manner, which is where it belongs.

https://www.nytimes.com/2017/06/21/world/middleeast/israeli-woman-who-sued-el-al-for-sexism-wins-landmark-ruling.html