Earlier quoted context omitted.
Oh okay, I actually misremembered what I had seen, I thought it was just the saluting thing. I just checked the original again[1], and that being said I still don't see how this isn't a ruling that is overblown; he's saying "wanna gas the jews" in a playful way to his dog over and over, and the dog responds when this is said. The ruling was that this was a hate crime, because it was "menacing, anti-Semitic and racist…
At a guess you didn't have any family and you don't know anybody that has family that ended up in a gas chamber?
I think you're simply appealing to emotion here to justify an unjust ruling and an unjust law.
I think the person you're replying to has a point in saying that some laws in Europe are pretty ridiculous. However, the difference is that that's a local law in the UK and not one that affects the entirety of Europe. Nor is it a widespread law in other European countries.