Only thing they got right...
...was Jackson. I don't mean Stephen Lang's performance which I think has been overhyped; I found it, much like the movie as a whole, boring, stilted and pedantic (although given that was pretty much how Jackson's students described him, maybe Lang did a good job after all!). I meant in its portrayal of Jackson as bloodthirsty zealot.
Now unfortunately, the film makers and especially certain members of the audience seemed to relish this aspect. That is bad in itself, but I think it is a perfect illustration of the following point.
If a dark-skinned Muslim from Southwest Asia named Ahmed said God told him to kill American soldiers, he would be branded a terrorist, imprisoned indefinitely without charges or access to an attorney or the ability to call witnesses or present exculpatory evidence, tortured and possibly killed. If a blue-eyed Presbyterian from Virginia with a suitably Anglo-Saxon surname (let's say "Jackson") and a suitably biblical given name (oh, how about "Thomas") said God told him to kill American soldiers, thousands of grandmothers would hang his portrait over their mantle and he'd be getting high schools named after him for decades.
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If Adolph Hitler flew in today, you'd send a limousine anyway