I don't think for a moment anyone believes that shutting down the forum will stop any outcry, nor that there was anything _wrong_ with users being upset because the forum is going away. The outcry is quite understandable -- this is a major change on very short notice, and people are _going_ to be upset. I don't intend to pass judgment on whether this is a change for the better or not; I simply don't know (though I would be inclined to note that the measures are significantly more draconian than here, which doesn't fill me with optimism).
However, it is the internet, and upset forum users have a tendency to express their displeasure in, how you say, a less-than-ideal manner, and in cases like this, also in a less-than-rational manner.