"America's Thanksgiving holiday originated when the Pilgrims gave thanks to God for sending them an Indian friend named Squanto. This much you already knew. What you didn't know is that long before the Pilgrims landed at Plymouth Rock, this same Squanto had been captured by two English sea captains, George Weymouth and John Hunt, and abused as a slave for fourteen years. Squanto had been free less than five years when Capt. John Bradford's Pilgrims arrived on the good ship Mayflower.
Squanto had every reason to organize a killing party and wipe out the pale-skinned invaders, but he chose to help them instead. Gazing with pity at Bradford's pathetic band of would-be settlers as they huddled around Plymouth Rock, Squanto thought, "If I don't help these silly white men, they're all going to die in the coming winter." And with that, he walked out of the woods and introduced himself.
Squanto died two years later of a disease contracted from these same Europeans."
Source - Roy Williams