As something of a lifelong mooch, I've had the opportunity to attend a wide variety of Thanksgivings, ranging from the deeply religious to the patentedly secular. The real question is, I believe, does the immigrant from a war torn country arriving in the U.S. have less claim to being thankful than the guy who can claim distant relations on the Mayflower?
Well, you're wrong. That's not the real question. The real question is, to whom are we - immigrants and sons and daughters of immigrants - giving thanks ?
No...
However, the actual question is whether an American "Thanksgiving" was instituted and sanctioned by our Founders' traditional belief in the Almighty's blessings upon our people.
THAT answer is a resounding YES.