[quote=@The Kid Lantern]
Yeah nobody's dumb enough to give somebody a holiday over there for slaughtering an entire country of people. Now that I'm older I think it's a f'ed up holiday myself.

~KL~
[/quote]

Thanksgiving is a celebration of a successful harvest. It has nothing to do with the genocide of the Native Americans. It's purpose is similar to the Harvest Festival in the UK.

If you want an international holiday celebrating wholesale slaughter, you could argue Armistice Day fits that description. Although I personally think of it more as a celebration of the end of the Great War, and not the Great War itself.