Some Americans of today are as suspicious and fearful of Christianity as my generation was about Black Magik, Voodoo, Communism or certain then-taboo perversions. It’s very sad how many have been conditioned by their schools or their peer groups. There has been a slow, steady erosion of respect for this faith. Some of it triggered by the sexual harrassment lawsuits of 20 years ago.
For many of the unchurched, it’s considered ‘Cool, or enlightened’ to mock or be contemptuous of anything that is genuinely inspired by the Bible.
It’s acceptable to ‘pretend’ or make utility of the symbols, but not to take such spirituality in a serious, respectful way.
Well, some Christian holidays have secular aspects. I'm not a Christian, but I still enjoy Christmas by giving presents, putting up lights, and watching Rankin-Bass cartoons. :-)