Mmmmm yes you have plenty of reason but its easy from away to talk.
But also Feyenoord know his chances to win the UEL are really low against the big teams we have this year, Man UTD , Barcelona, Juventus, Sevilla,Roma, etc, they are really strong, so i think they know his capabilities and limitations.
You're right, this year the Europa League is filled with very big names and it will be very difficult, even next week against Roma. I'm looking forward to the game today, but I assume that both teams will give everything, for Ajax it's the last chance for a title this season. Feyenoord also has home advantage tonight, so it will be even more difficult for Ajax.
More easy, you know "its better a bird in hand than a million flying".
And one thing i dont know, for most of the fans maybe its more important the derby against Ajax than any other thing, but this only can be confirmed by someone from netherland.
It's always difficult to say, that's only know Feyenoord fans whether they the prefer to win in the Europa League or the National Cup. For me, the Championship Title would be better than both titles, but Feyenoord are well on their way.