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human
[X-Men Days of Future Past]Why did they need Magneto?

I feel like I've asked this, but I don't see it in my history, so maybe I thought I did, but why do they break Magneto out of the Pentagon (why is he even being held there anyways?)?  I mean I know he says in the future that they'll need his help, but they don't.  If anything he makes things worse!  Was he just assuming they would need his help?
gpt
I think the idea was that the only thing that could hope to get through to Raven was the two of them together. Either one on his own, it would just be like "yeah, whatever. I've got a midget to kill," but by going together, they could show her that what they were saying was so important that they had come together to say it to her.