That said...again...public land set aside for the public to use for celebration winter based holiday's should be used for that. If you want to celebrate hanukkah, kwanzaa, the winter solstice, or anything else instead of Christmas....no problem. Get your space and put up whatever thing you want. More power to you, and to hell with those bitching about it.
What I DO have issue with is people who specifically attempt to grab said spots and then go out of their way to specifically put up displays that have NOTHING to do with the celebration of a winter holiday and are meant to do nothing but essentially purposefully troll those who are coming to the location specifically to look at holiday decorations. If you want to be a jackass and try to protest "christian exclusivity of religious displays" then be my guess, it's your right. It's also my right to think by doing so you're being a thick headed jackass that is doing more harm to your cause then good and are actually the individual being the most selfish and egotistical in the situation because you're purposefully going out of your way to bother or hamper the holiday activities of the vast majority of the public that DOESN'T give two ****s about either side's pissing match over religion and just wants to ****ing see some lights and pretty displays.