Why isn't religion considered a mental disease/delusion? Hopefully it'll get banned under Trump (who has stated he's not a Christian)

Why do right-wingers always go to name-calling as a first-resort?
>KEK
>R*TARD
>F*GGOT
Seriously, imagine being over 18 and talking like this. This guy should be embarrassed.
https://www.youtube.com/watch?v=AkBM37xidRg