Engels was a German nationalist

And we know where that ended up!

This is our calling, that we shall become the templars of this Grail, gird the sword round our loins for its sake and stake our lives joyfully in the last, holy war which will be followed by the thousand-year reign of freedom.

So Engels said. See here.

And who does not know of Hitler's glorification of military sacrifice and his aim to establish a "thousand-year Reich"? What a copycat old Adolf was!