I'm the guy that made this, although I don't know who posted it here. There are hundreds of videos on all sorts of topics using the same clip. I got challenged to make one on the AK vs. AR theme, but thought I liked 1911 vs. Glock better. I wasn't thinking about WWII or the Holocaust, just the same things that all us shooters weigh in on when we compare pistols. I have a Glock 21 I rarely shoot and a 1911 I use every month in USPSA. I thought it turned out pretty funny, and it got thousands of hits, so others must have thought so too.