The film is a comedy/satire so perhaps he felt he pushed elements of it into wild and wacky territory that would be considered farfetched, possibly deranged.

However, the deranged bit refers to the people who are suggesting it is as conspiracy - it’s one thing to use the idea in comedy movie and quite another that this would happen in real life. For one, that shot would be incredibly risky for someone to attempt especially without a sniper rifle or the relevant training.

I think he may be overreacting as it may not have even been mentioned if not for the Pennsylvania link.