No. Killing someone is never legal in a civilized society, regardless of what someone else might 'want'. There are no valid contexts where pre - meditated murder is legal.
It could mean that someone is asking another person if they really want them to kill a particular 'him'. It might be part of a very disturbing or serious situation in a story. Maybe there's some deep conflict or vendetta involved.
I don't know for sure. It could be a blend of truth and imagination. Sometimes authors take real incidents and build a story around them with added elements.
U-571 is mostly fictional. Although it might draw inspiration from real events related to submarine warfare, it's not a direct retelling of an actual occurrence. The story is crafted to engage and thrill the audience.
U-571 is not based on actual events. It's a movie that takes creative liberties to create an engaging narrative. The filmmakers crafted a fictional story around the theme of submarine warfare.