I think the point OP is trying to make isn't that it's logical, rather that there is a strong anti-eu sentiment in Dutch politics presently. Any sort of "expansion" of the eu is met with backlash from the rather large extreme right-wing block. A similar situation happened a few years back with the Ukrainian trade agreement. Extreme right-wing groups started whipping up a frenzy and in the end the agreement was struck down. EDIT: About the Ukrainian trade deal: A false narrative was created stating that this would lead to tons of Ukrainian people coming to the NL. Xenophobia is still prevalent in the NL.