[foldr]

The original post said that people had placards “calling for the death of JK Rowling”. It may be that the poster’s overall point does not rely on this specific factual claim. But don’t try to muddy the waters around this: it’s a straightforward factual claim and people are right to ask if it can be sourced. So far it has not been.

[EnPissant]

If there was a protest where people had signs that said “death to <slur>” while screaming “fuck <member of group targeted by slur>”, and calls were made to defecate on that person’s art, would you say death threats were made about that person? Please take a moment to substitute various groups and people.

[n4r9]

The legal system does not operate according to blanket statements. Police make a judgement of whether the death threat is credible. This depends on how specific the threat is and whether it occurs in the context of likely violence.