an historian, m8. muslims aren't all clued in on the life and deeds of muhammad, even if they're obliged to pretend they are.
i agree with you, incidentally. he is an odd figure for a prophet, but there are better people you could ask about these things. if it were me in your position i'd be asking her about her favourite foods, television shows or something asinine like that.
on a more assburger note, the life of muhammad is compiled from anecdotes related by his companions, each of varying reliability, all collected after he died.
iirc i've heard a muslim scholar giving a lecture on this issue, saying that he doubts the authenticity of that particular tale, the one about killing the jews (he was a a moderate and perhaps inclined to think so), but there really isn't much we know for sure about the life of muhammad or what he did.













