Russell here is making the same mistake as most people today. It wasn't the "Germans collectively", it was the German government, tolerated by a mostly ignorant population with a few "hawks" to show support for the government action.
Contrary to the top post here right now, this is the same thing happening in the US right now. The government bombs another country every 1-2 years and people let it happen. We're still in appeasement times but the state already gradually disrespects individual liberties and soon America will become a collective much like the one described in the article.