Much like pirates and gangsters, Vikings are cool if you consider them from an aesthetic as opposed to moralistic perspective. Everyone has evil ancestors, but some of them were cool.
One of our big exports. Germans were obsessed with American outlaws (Karl May). And I am of the opinion that this is what the Nazi's were thinking when they invaded Poland and Russia. They wanted to create and settle their own variation of the "wild west". Hard to explain to people in 2025 how captivating the American frontier was to a European in 1910.