See the perspective from non-believrs. Though they do NOT follow Christian celebrations, they still suffer Christmas from before Halloween (BTW: Not saying "Happy Halloween" is a war on devil worshipers). 
Before we can say "Boo!" the sale of Christian stuff begins. (A retailer in Blue River sells Christmas stuff YEAR ROUND!). Costco is the most religious as they display wrapping paper along side patriotic 4th of July American flag toilet paper. 
The assault on the liberty to avoid "Xmas"  continues with plastic trees and Nativities. Really?  An idyllic barnyard, with stinking animals where Jesus was born because no one made reservations? His birth was a surprise? 
Then the music begins. First on Christian stations, then mainstream, then punk.  You should hear the Twisted Sister Christmas songs - really! 
It continues this way for weeks, with reminders to keep "Christ in Xmas",  and after with sales of storage containers for all the Xmas crap. 

Christmas - a war on non-believers  ;)