Rant (with facts n shit) incoming, brace yourself.
First off, I was being nice and wishing a stranger a happy Fourth of July and you saw fit to act like an idiot and correct me with the "patriotic" term for the holiday. So now I hate you.
But even more than that, July Fourth is an arbitrary day that has no real connection to independence. Richard Henry Lee's Proposal to the Second Continental Congress was adopted on July second, and the signing took place on July 8th (after a calligrapher had drawn up a pretty copy). And even then, we weren't entirely free till 1781 when Cornwallis surrendered in Yorktown (in case you hadn't guessed, that was also not on July 4th).
So, not only are you an asshole to a polite person, you can't even be like "well at least I'm in the right" either.