thats silly
lets say you believe Meghan reason for leaving had nothing to with racism -the onus is then on you to prove it.
works both ways
No it doesn't, because of, among other things, the "nuclear" impact of a claim of racism; it is soooo damaging, that it shouldn't be thrown around without challenge, and good cause.
That, and the general principle of innocence before guilt.
Here's a thought experiment on the logic of your statement, "lets say you believe Meghan reason for leaving had nothing to with racism -the onus is then on you to prove it."
There are two initial options: that "the reason was racist", or that it wasn't.
Option one; that the reason
was racist.
I believe that it isn't. I am therefore incorrect in my belief.
I can't possibly be able to prove one way or another, as I am not necessarily in possession of any of the facts that led the claimant to come to their conclusion.
Ergo, the claimant may / must prove that the claim is true, for it to have full credibility.
(If evidence is presented to me to support the claim - emails from the Editor of the DM, for example, about driving "the black b!tch out", coming to light - it would refute my assertion, and would shred my credibility if I did not change my position).
Option two; that the reason
wasn't racist.
I believe that it isn't. I am therefore correct in my belief.
I still can't possibly be able to prove one way or another, as I am not necessarily in possession of any of the facts that led the claimant to come to their conclusion.
Ergo, the claimant may / must prove that the claim is true, for it to have full credibility.
But they can't, because it isn't (in this example).
Therefore, although I am completely correct in my position, it is impossible for me to prove that I am. Which refutes your point entirely.