Do you think for example Chelsea fans, Spurs fans or even West Ham fans would be brushing it off if they were in the same situation?
Chelsea and Spurs fans wouldn't because they are mostly soulless, entitled pricks who support a 'big' club expecting glory that will somehow reflect well on their personal egos.
I'm a long-term Palace fan since I was 6, because Palace is in my blood and in my roots. I know how it feels to lose to Tranmere, Grimsby and Scunthorpe, so when we play teams from lower leagues I respect them and understand them. I don't throw a hissy fit if those teams get lucky and beat us. I take it on the chin, applaud them off the pitch and wish them well, understanding that is what football is about, that is what being Palace is about.
No other team would win the cup and then go out the next season to a sixth tier club. And you know what? That's actually what I love about Palace. Never a dull, predictable moment.
Maybe that's not for some people, well maybe they might be better off supporting a Big'time Charlie club like Chelsea.