I'm a Dutch, living abroad.
What I can say is that the situation has deteriorated over the past decade. Mostly thanks to kowtowing to the US. Nowadays everyone has to carry ID all the time; that's since just over a decade (and the rule was implemented remarkably silently). You have to give fingerprints for your passport, officially to make it more secure (but does it? Last summer I didn't see fingerprint scanners at the border, for example).
Overall I think the Dutch do not fear their government (not like in more totalitarian states like the US, where everyone seems to fear their government), at least I don't exactly fear the government. It is chosen democratically, high degree of freedom of expression, and a free and strong press takes care of providing a proper counterbalance.
The police in general do not abuse their power. Though over the past ten years there are more and more laws that give the police opportunities to abuse power, like the right to conduct random searches of people and vehicles. Police for example can at any time without giving a reason cordon off a street and search anyone that happens to be in that area.
This AIVD thing is different, though. I don't consider AIVD to be government, they're more like police or judiciary: paid for but independent of the government. They have a mandate, to collect intelligence, and there are laws regulating what they can and can not do. Governments of all countries do this, it's normal part of police work too.
What happened here appears to be outside that mandate (it should be, imho, but I don't know what the law says or what exactly happened). If they want info from a forum, they can just register as user (may need some undercover work, whatever), and read all posts on that forum - like any user can. It's not OK to hack into a server, and download complete databases, that's going too far. In case of a known criminal link, it's defensible, but in this case there seems to be no such suspicion.