It's not obscene, IMO, it's DEPRAVED. It is disgusting, it is unnecessary, and it was made to make money.
That it was written, directed, and produced by a huge industry and then made available to be watched in a movie theater is all one needs to know about the machine that is Hollywood, the same machine that produced (no pun intended) Harvey Weinstein.
That is no coincidence, my friend.
> Or, that way the audience might wonder about the darker parts of 20th century Americana around them, much like Lynch did as a child.
I can't stand anything about 1950s America, but 2020s America makes it pale in comparison, and Lynch's America was on that horrible descent from "does good for the world" to "embraces totalitarians for profit".
How we make our money is a bellweather of the soul, as is the art we produce and/or appreciate. The question is, "Does it elevate humanity? Or not?"
Learning about evil is necessary on the path to wisdom, but profiting off titillating the impressionable is foolish and detrimental to society.
There are many ways to tell the story of Jeffry Dahlmer, and the choices a writer and director makes in that regard show those folks' character, or lack thereof.
Which movies by David Lynch have you seen?
Lynch, by the way, was an outsider in Hollywood and in the wider movie industry. He didn't make large budget movies nor did his movies bring in a lot of money. When he was promoting his last movie, he didn't even have money for proper advertising and had to rely on publicity stunts like sitting in a director's chair next to a live cow in the middle of Los Angeles to draw attention: https://www.youtube.com/watch?v=n9gVoSiXup0
His struggles were largely due to his refusal to trivialize violence or turn it into something easily digestible. Many of his characters (such as Dale Cooper in Twin Peaks) are highly moral and good-natured people who encounter incredible evil. This evil is depicted in an exceptionally disturbing way to amplify Lynch's message about genuine love, compassion and human connection. Lynch did not exploit or glorify violence. He presented it as something deeply unsettling to highlight its emotional and psychological impact instead of using it for shock value or cheap entertainment.
It seems like you are very angry about something you don't know much about.