Frankly, smallpox really wasn't needed to do the job. Chickenpox, measles, mumps,... the ordinary diseases were deadly to the American Indians.
Then, think of the guys handing out the blankets? Wouldn't they get smallpox as well? Most folks who had been vaccinated still didn't mess with smallpox. There were sub-varieties of it that didn't necessarily succumb to the anti-bodies produced in response to innoculation.
Most of the big die-offs were done with by the winter of 1648. Over the next two centuries small groups of isolated individuals would catch up to the plague. Some of this was observed by Lewis and Clark.
The cause of smallpox was not discovered until almost 200 years after this happened. No one could have known this at the time(unless they had a time machine)...
Think about, if you're capable...how does someone ANYONE go about infecting blankets with smallpox, without spreading it to his own community/family and getting the disease himself???
It's not possible. Because it never happened and is not a "fact", it's from a movie. I know you folks who love to claim Indian blood delight in it, but Geez...give that one up, please. It's just too stupid.
You mean like history is repeating itself in the mideast right now?
History does repeat itself, constantly. It's too late for groups like the Indians, but the Jews aren't going to let it happen again. I admire that a lot.
Even short-term history repeats itself, we probably will be fighting Iraq before the year is over (and hopefully cleaning that mess up once and for all).