I let #xrecs fall by the wayside, but this is a good day to revive it.
MAGNETO TESTAMENT isn't a superhero story. It's a Holocaust narrative, and it's brutal. If you only ever read one X-Men comic, it should be this one.
The afterward also points out that for too many people, Magneto's backstory is their first exposure to the Holocaust. That's fucked up. Talk to your kids. Talk to their teachers about their curriculum. Make sure they know.