@FBM,
Why don't you read the articles I cited first, especially the PBS one? Then see if you still have questions. Many physicists do in fact believe it is utter bullshit, akin to magic, even if they don't use that precise word. They regard it as being what a dictionary would define magic to be.
Others disagree and think the many worlds theory is "true." Obviously, THOSE physicist do NOT call it magic. But magic is not what they say it is. It's not what you say it is. It's not what I say it is. As a matter of common convention, it is what the dictionary says it is. If the mechanics and conclusions of the theory are "magic" by dictionary definitions, then that, not the physicists who adhere to these occult-like claims, would be the deciding factor in determining whether they "believe in magic."
BTW, the very first article I gave you provides a list of prominent physicists who oppose, and who advocate, the many worlds theory. Again, this information was provided a long while back.