Yup, and in a situation where I just want to be polite and don't have the time or desire to find out exactly which fairy tale the person subscribes to, the catch-all term "Happy Holidays" conveys all the good-natured positive feelings I sincerely do wish on the recipients. Only a touchy asshole would be offended by it. Only a touchy asshole would somehow now claim there's a war on Christmas.
As far as public displays of nativity scenes...well, if it's on private property--who gives a shit. Those who want public displays on private property torn down are being touchy assholes themselves. However, if the nativity scenes are on public property, there are two choices:
1. Allow every other religion to display whatever the fuck they want on whatever the fuck important holidays they have
2. Don't display anything at all.
Again, not unreasonable unless you, yourself, are unreasonable.