This is obviously complicated, with many disputed claims. I have two suggestions.
I looked quickly, and didn't find a summary of the evidence about his parents. Perhaps I missed it, but having a research note under the subheading 'David's parents' (or something like that) would make it easy to find where you've put that evidence. And then if people think you've missed, or misevaluated, evidence, they can let you know specifically what they disagree with, which might lead to more progress than the generic "how can you prove this" questions you're getting.
Second, you could mark his parents "uncertain" (on the edit screen), if you think that's appropriate. That would signal to people that you recognize questions exist.
Harry