I need to look into the validity of some claims. The conservatives maintained only the positive side of the history, that the Indians (Native Americans) and the English pilgrims were friends and Thanksgiving day is to remember that. While the opponents recounted the wars between the two.
Particularly, between the English settlers (King Philip's War) and the Wampanoag people.
On the conservative side, we have authors like Melanie Kirkpatrick. Who has written books about this. On the other side, we have David Silverman, who called all this festive joy a myth.