Back in February 7, 2013, the Crash Course channel released a video that investigated the history and context of the period around the first Thanksgiving.
This video provides a reminder about the history and context leading up to this event and the aftermath of what religious persecution by colonists wrought. Remember, Plymouth Rock and the Pilgrims was NOT the beginning of English colonial rule in the New World. Also, remember that the Puritans were definitely NOT religiously tolerant to religious (and social) views that went counter to theirs (and many of which we might find normal and perfectly okay today).
(Yes, colonization sucks for lots of people, but awesome for some.)