We always celebrated Thanksgiving, in the traditional American manner, with a Turkey and the family gathered together.
It is not truly a Christian Holiday, but rather a Jewish Holiday (Succoth) that the Pilgrims were trying to celebrate. They got most of the themes correct.
It is about gratitude for the bounty we have been given. This seems like a very Jewish theme to me.
We need to be grateful that most employers in the country recognize and give the day off for this, the most Jewish of the secular American holidays, even though they got the dates wrong.
P.S. I do not feel the same way about Halloween or Valentine’s day.