> After Crimea invasion, as an example. After Russian influence over American election.

There wasn't that much bloodshed in Crimea. And to be honest, nobody really knew if the people there were pro or anti Russia anyway. Russia and USA have been influencing each others elections, and those of almost every other nation in the world for many decades.

These events weren't even close to what is happening now. Also, why is it Germany's duty to protect Ukraine anyway?