I feel like Magneto created the perfect catch 22 for Wanda. While she is human no mutant can harm her but once she comes a mutant again she has amnesty for her crimes and i'm sure most mutants would be too afraid too do anything thanks to his buddy exodus stocking the fear of god into mutants about wanda being a pretender. I wouldn't go after a woman that could end my mutation. I don't know if it was the intent from the start but it can be put together very well to look like it. Most called the kill no human law into question and magneto just vehemently defended it in sword.
By most people i mean a lot of readers.