Edit: Here’s a link to what is most likely the real manifesto: https://www.kenklippenstein.com/p/luigis-manifesto
Ken Klippenstein is a very reliable journalist and this version of the manifesto contains the snippets that have been released by law enforcement. Also, considering the thing was hand-written, that very long version involving his mom is dubious. (And there’s not any good evidence that his mom is in anything besides decent/good health)
It can be discussed without the assumption that he is guilty. I think it is dangerous for the public to remove the presumption of innocence, especially in cases like this where the ones affected are the ones with power.
I would even argue that it’s more important to argue with the presumption of innocence. Someone killed a health insurance company CEO and a lot of people are rejoicing over it, then someone who is quite possibly innocent and who seems to have suffered from health insurance company decisions has been arrested for it. How many other people have experienced something similar to Luigi? How many other people fit the profile because the system destroys that many lives? He has already suffered, how much more will he have to suffer for something that he possibly had no connection to, for the benefit of the people who seem to have already ruined his life?