I swear, I’ve read every single X-Men comic (up to maybe 03 or so, but back to the first issue, and I’m catching up to present) and seen all the movies. I’m a goddamn PhD in Magneto Studies.
Magneto is Jewish. It matters to him. To paraphrase biologists: nothing about magneto makes sense except in light of his Judaism. He is not the most observant, but he cares. It matters.
No one who erases this should claim to understand the character. It is as much a part of him as controlling metal is. More so even, because he’s lost his powers but never has he lost his Jewish sensibilities.
So, it’s now 5776. Never forget that magneto is Jewish. In general, never forget. It’s a phrase dear to his heart.