They weren't raided for making true threats, but for letting the site become a "lawless realm" and/or for "sowing hate against different opinions and representatives of the country", charges so vague they could apply to almost any online forum or uppity news site.
"Hate speech" is a real thing there that will land you in jail.
This is wildly inaccurate. In Germany there are mainly three kinds of speech punishable by law:
(1) Defamation
(2) Volksverhetzung ("all jews must die")
(3) Incitement (there are two different kinds of this, one where a specific person is incited to do something criminal, and the other where you publicly instigate a group to do something criminal)
It is quite clear that these don't nearly cover everything that may be commonly considered "hate speech".