Of course it is, it's called freedom of opinion, simply some opinions are considered crimes by the EU law system.
Removing a post that incites someone to commit suicide or to kill someone can save the poster from being prosecuted.
That's it.
Private communications are excempted though, unless they need to be used in a trial after a judge authorized it.
He was 4 years old.
If you read again what I wrote it's already there: free of opinion doesn't mean that all opinions are permitted, because some of them are crimes.
Anyway, if you know Berlin you should also know that there have been a spree of neo-nazi violence lately and the police is not doing much to stop it (I lived in Berlin for a few years)
https://www.dw.com/en/berlin-police-admits-failures-over-far...
It is doubtful that it will see something like encryption that allows speech and communication at a distance without government knowledge or control as a basic human right. After all, if some speech is so dangerous that it cannot be posted online, then we should make sure it is not spreading to who knows what kinds of people without government knowledge.