Oh, NOW undocumented aliens are a bad thing.
Context is everything, it would appear.
And for the record, harvest festivals reminiscent of Thanksgiving were a ritual going back to Biblical times, they just were not called “Thanksgiving”.
You need not be Christian or even of European descent to celebrate Thanksgiving. But belief in a higher power is implicit with the festival, as to whom do you believe should be receiving the thanks?
The Pilgrims were serious students of the Old Testament; they based Thanksgiving on the feast of Sukkot which was a harvest festival to give thanks to God for the harvest.