There's no info in the O' Reilly thing about size and I think size could be an issue here, though nobody talks about it in tilted sexuality.
Are we talking a nativity scene postcard versus a big iron star and crescent? Or are we (perhpas more likely) talking about an expensive outdoors nativity scene with a lifesize fibreglass baby jesus and flashing lights versus a cardbard cutout menorah posted on a noticeboard.
Just keep it modest, make everything the same approximate scale and monetary value, leave room for all the other religions and stop moaning about it.
If you REALLY need a truck and five workers to put up the Christmas display, you better be ready to dedicate those exact same resources when Chinese New Year rolls round or someone wants a big flashy interactive 'life of Muhammad' display because I think everyone's got that right to equal representation.
Either that or don't bother with any of it.