I agree with this, to an extent; we likely will never be able to conclusively verify the matter, just like many questions regarding ancient history. Informed speculation is basically the best we can do. That said, given my academic background, I would hesitate to make too much of this point, because it would seem to imply that further scholarly investigation into the matter is pointless; a sentiment with which I vehemently disagree. So long as there is something that can be done, I feel that scholarly investigation is ALWAYS desirable. Even if we cannot conclusively settle the matter, knowing more is always better than knowing less. Unfortunately, as you point out, this is a fairly sensitive subject, and people on EITHER side are usually pretty invested in the matter- so it makes objectivity difficult, and discussions tend to get messy. That said, the only way out is through, as they say.