You're the one who needs to read some history books if you think violence isn't the solution. It's the only solution that works. Fascists using violence back isn't a counter-argument. That's only logical and part of the equation.
But better than for just on the aspect of fascism, I'd really recommend Reflections on Violence by Georges Sorrel, before you condemn violence to be a last resort and inferior to pacifism or civil debate.
As far as the German government is concerned it never denounced or sanctioned Israel over its expansion and repressive politics.
So long as that's true, Germany does fully stand behind Israel.