Even during the World Wars the defence industry wasn’t wholly nationalised.

37% of Rheinmetall’s shares are owned by NA investors, none individually control more than 6%. And no, Rheinmetall wasn’t founded by Nazis. It predates the Nazis by decades, the company was founded in the same year Hitler was born in. And even if it was, why would that matter today? The company is not owned by the people who founded it. It’s not even owned by their descendants (who still would not be the same people).

They are also NOT selling to both sides. I’m not even disputing that they wouldn’t, they might well want to, but they literally can’t. They’re not allowed to and that is enforced.

So what’s your alternative? Do nothing as Russia invades country after country and hope that they’ll stop before it’s our turn?