This is indeed not at all about his code. I don't care what he thinks of vaccines and COVID - I just as much don't care what Linus Torvalds thinks about these things. They are damn programmers. Their business is to ship reliable, usable, secure software.
"... insane and technically incorrect ... idiotic lies ... you don't know what you are talking about ... SHUT THE HELL UP ..." - Linus Torvalds
https://lkml.org/lkml/2021/6/10/957
It's not just his code.
The COVID conspiracy theories Enrico Weigelt pushes are riddled with bugs, logical errors, and security holes, and don't compile or pass tests either.
Linus already reviewed both the code and the reasoning, and rejected them for failing basic correctness.