Who knew a World War II film from Finland could out-Tarantino 2009’s Inglorious Basterds and turn one pretty basic idea — killing as many Nazis as possible over the course of 90 minutes — into deliriously entertaining cinematic gold? Here, dear reader, is all you need to know about the newly released film Sisu, from Finnish screenwriter and director Jalmari Helander: Some things, like watching a horde of Nazis die in all manner of gruesome, extremely bloody ways at the hands of a one-man, John Wick-like killing machine, never go out of style. And by the way, ’tis the season...