Sparing a district means nothing, especially if they live in a country full of vampires. Not to mention, not all of them know or even care who Akira is.
Also, he looks funny with all that blood on his face, even coming out of his eyes. XD
I still can't understand how the dude was able to take out his syringe and hide it in the back without anyone noticing it...
And no, I don't think Miyabi knows nukes exist.
There are two movies, I think. The first one is in English, surprisingly.
https://www.youtube.com/watch?v=sVfjfnbLUEI