You seem to have completely misrepresented the actual facts.
Not at all.
The idea was floated by one party in the Dutch ruling coalition, and has been met with nothing but rejection by everyone else.
Politics (Noun) - the practice and theory of influencing other people.
That fact that the idea for a mini-Schengen was even brought up (particularly by a party siting in a ruling coalition) means citizens and their elected representatives share the same sentiment. And it certainly isn't a topic which will only find favor in Holland. Even if there are others out there who don't see eye to eye on the issue they are at least willing to listen and discuss it. That's how politics works. Ideas; lobbying for those ideas; gaining traction with those ideas; ideas eventually becoming policy. Why else do opt-outs even exist then for some member states (including Poland) on some EU matters? Why no harmony whatsoever then on the processing and placement of migrants? Because local, regional and national politics matter and they definitely shape and affect the entire EU enterprise.
A mini-Schengen may be unthinkable for some but it was effectively in place anyway until recently under the Dublin Regulations regarding migrant flows through those peripheral countries on Europe's underbelly.
Now that place like Germany and Sweden are groaning under the presence of migrants and the spiraling associated financial costs it is not surprising that local parties are devising ways to staunch and divert the problem - even if it means attempting to create a broader Romano-Slavic buffer zone around a Franco-Germanic speaking core. And it stands a reasonably good chance too considering that the latter group has historically been the higher contributor to the EU budget compared to the former group.
I've crossed countless non-Schengen borders illegally and without any consequence.
You seem to have completely misrepresented the actual facts about your character then with your employer.