Speaking of statements open to misinterpretation... sorry, as the other commenter imagined, I meant that refusing entry for either type of statement would not be good, but one would be worse than the other.
Refusing a foreigner entry for inciting violence (even against people who are not Americans and not in the U.S.) would be perfectly fine with me, though I don't approve of demanding foreigners make all their communications available to CBP (which is basically how we got here).
