"non-existence"

So... even the BBC (even!) now believes things not because the evidence points towards it, but because others believe it, or don't believe it.
Dear Ms Keen... We put the word "genocide" in inverted commas in this case because there is an international dispute about whether the killings were in fact genocide.
It doesn't even have to be driven by fear: it is just the line of least resistance, the default option.
Find me an international issue that is not in dispute. They think they are offending no-one by not committing themselves to a categorical answer. But a non-categorical answer to an issue that is categorically undisputed by anyone who has bothered to look at the evidence is not just offensive, it is wrong; and it is also judgemental - which is the very thing they think they are avoiding.
Imagine...
We put the word "Shakespeare" in inverted commas because there are some people who think he did not really exist
We put the word "democracy" in inverted commas because there are some people who think it does not apply to the United Kingdom
We put the word "sincerity" in inverted commas because some countries believe that Tony Blair has none of it...
We at the BBC strive, incidentally, to provide "fair", "accurate" and "well-researched" "reporting" in all our "news" bulletins and we do not take sides on issues that might be thought to be controversial, like whether or not "George Bush" exists.