It's called Discredit by association.
Just last night trying to Redpill a friend who[s pro Trump, admits fake news, questions Vietnam and JFK (Her theory was accidental SS fire…I disagreed). I mention Moon landings and right on cue asks if I'm gonna claim Flat Earth. It works like a charm.
She questions Osama's death, but then still firmly in the official 911 narrative…puzzling.