- The 88% poll appears to be conducted amongst (online) Telegraaf readers (here is an online version: http://www.telegraaf.nl/watuzegt/25920298/__Britten_moeten_i...) which is a bit comparable to the British 'Daily Mail'.. It's very anti-EU, and while it definitely has a large number of readers, the 88% is not at all representative of the Dutch population.
- The Ukraine referendum is mentioned, specifically: "The agreement itself is not that critical but the vote was widely used as a vote on the EU itself. It went against the EU by 61% to 32%, albeit on low turnout of only 32%.". The low turnout is relevant, a lot of people decided to strategically not vote in order to signal their dislike for the referendum itself. Although the minimum turnout (30%) was barely reached, the fact that this turnout was so low - combined with the fact that the anti-EU parties implicitly marketed it as an anti-EU vote - signals to me that much fewer people would vote against the EU in a referendum similar to the British one.
There is certainly a lot of anti-EU sentiment, but this article does appear to cherry pick its sources.