The Only Gay In The Village

here's what we know about benoit blanc

he's a famous detective who has worked on a variety of high-profile cases

his father was a cop

his mother was religious and they stopped speaking to each other

he listens to musicals

he is very observant

he is not religious

he lives with a man (confirmed off-screen to be his partner, ambiguous onscreen)

he is bad at mystery games

we know glass onion took place in May 2020. as part of this case, he watched a powerful white man try (and eventually fail) to steal the work of one Black woman and try to silence/intimidate another. and right after that he likely observed the way cops treated people (especially people of color) during the protests of summer 2020

In knives out, Benoit Blanc works closely with the cops, but also willfully invites a suspect he knows is involved in the death of Harlan. While he does not do anything to obscure her potential guiltiness, he does let her protect herself.

in glass onion, Blanc agrees to help Helen with the case outside of law enforcement. the cops don't even show up until AFTER the glass onion building bursts into flames.

In wake up dead man, Jud is already assumed guilty despite circumstantial evidence, but Blanc's reading of him shows him to be kind-hearted and incapable of murder. While he does work with the cops, he intentionally gets in the way of the law and helps protect Jud because he knows him to be a scapegoat.