X-Men: Magneto Testament

Greg Pak writes the definitive origin of Magneto by focusing solely on his childhood in 1930s Germany. When the Nazis force him and his Jewish family into the Porajmos concentration camp, the young Max Eisenhardt begins to realize the cruelty of humanity… and his own powers.
Ethan Wagstaff: X-Men: Magneto Testament 1-5 (2008) was absolutely badass. It was an amazing story and after it was over they added in information about what happened in the real world during that time period.