> I remember vividly being a very tech-involved twenty year old, extremely excited about Reiser4 when this all came to light and thinking "There's no way he did it!
Becoming involved with a person and/or their project has a way of clouding judgment. ReiserFS blurred the lines between person and technology, so getting excited about the file system in a way meant you were backing the person, too.
None of us likes to imagine ourselves supporting a murderer, criminal, or other bad person. So when the accusations come out, the first instinct is to deny them. Admitting they have any truth would be equivalent to admitting that we supported a bad person, but denying them allows us to remain consistent.
This plays out frequently with celebrities, internet personalities, and politicians.
More recently (and without the crime, obviously) I'm reminded of the revelation that Andrew Huberman was not a great person in his personal or professional lives, and that his podcast content is full of misleading claims. The poor accuracy of his scientific content was well-known in the research community, but people didn't want to believe it because they liked Huberman and his personality. When the revelations about his personal and professional activities came out, people rushed to his defense and dismissal. Even today mentioning his name online will summon commenters who downplay the accusations or try to defend him. Listening to hundreds of hours of someone speaking charismatically has a way of charming people into denying any information that goes contrary to what they want to believe about that person.