Who's shocked, really? "Oh no I'm so surprised the dictator who's assassinated public officials before is maybe trying to kill us!"
Declare Russia an enemy of the state or whatever allows you to sanction them in totality and be done with it. The fact they won't because they've made themselves so dependent on their gas and other exports is fucking pathetic.
Russia has mostly assassinated russians in other countries they saw as "traitors". Plotting against the CEO of one of the most important arms manufacturerer is a whole other dimension.
You seem to not really have a clue about German politics by the way.