By now we’re all accustomed to the hijacking of religious holidays for both consumerism and multiculturalism, but I confess I still bristle at the usurpation of Thanksgiving as a red-letter day for the diversity movement. To use our national holiday as yet another opportunity to point out that we are not all the same only adds to the gnawing sense that America is a fractured culture.

In my mind, there is nothing as quintessentially American as Thanksgiving, with all the Rockwellian myth and traditions that surround it. For generations, Americans of every race, religion and ethnic origin have put [...]