It’s more of a joke on the people voting for the party and not the party line itself. The party means it
Kinda the classic conservative thing of not seeing a problem until it effects them personally. Or at least a variation.
The US is seeing the same thing, spouses voting for Trump then seeing their illegal/asylum seeking husband/wife deported and being shocked because “they were doing it right, or they were good not a problem”
The cognitive dissonance is amazing
If it walks like a duck, and it quacks like a duck…