The government of Germany clearly prefer to side with Israel on any matter related to Palestine (or Lebanon for that matter), but in fairness it has taken this long for the ICC's prosecutor to bring a case. The real tests will begin if, for instance, Netanyahu visits Germany, because that will trigger an obligation for Germany to arrest him. There may of course already be domestic German laws which arms sales to Israel may be breaking, but as far as I'm aware Germany has only had a duty to cooperate with the ICC since the warrant was issued earlier today.