Earlier quoted context omitted.
You're conflating whether one should feel guilty for supporting an author, and whether the author's speech outside a work matters to understand its intended meaning. The latter is the actual Death of the author , the former is usually called Death of the author by people who want to separate themselves from the authors they know they can be judged for supporting.
I think my point was distinct from naming this idea (Death of the Author). It wasn't about guilt it was about consequences and those are distinct things. Also, AIUI Death of the Author is not about whether their beliefs mattered to understand the intended meaning, but instead whether "intended meaning" is even a thing anyway. No need to understand it if it doesn't exist. I prefer in other contexts not to try to guess…
You might be; from the UK's Crown Prosecution Service guidance website[1]: "Involuntary Manslaughter. Where an unlawful killing is done without an intention to kill or to cause grievous bodily harm, the suspect is to be charged with manslaughter not murder.". From Wikipedia[2]: "In English law, manslaughter is a less serious offence than murder."
[1] https://www.cps.gov.uk/prosecution-guidance/homicide-murder-...
[2] https://en.wikipedia.org/wiki/Manslaughter#England_and_Wales