"However, in this regard the governments have a vested interest in keeping criticism about their immigration policies down"
This has nothing to do with Germanys immigration policy. Talking about Offenses with Anti Semetic origins has, literally, nothing to do with our Immigration policy. You just despair at the fact that most of them are commited by right wing extremists. And I'd be pretty damn bitter too, if I'd find out left wing Extremists commit hate crimes in, idk, Canada or France. But, instead of trying to push for their innocence or relocating the Blame, I condemn them, because thats not what I belive in or thats not how I think it should be achieved.
But yes, you are right that you shouldn't completely trust the Government. But at the same time, when multiple independent sources back up their claim, or atleast confirm it, you have to belive something.
"Germany on the level of Sweden"
What are you talking about? Whats wrong with sweden?