Merursault, in my opinion, is a criminal. Not for his attitude, but for his act of murdering the Arab. Does Meursault deserve to die? I'd say yes. Is he more dangerous than a criminal with motive? That would be a no. I think that Meursault is a murderer and should be punished for that and only that. 

I think that Meursault is a threat to society because he killed an Arab when he had very little reason to. I feel like the next time Meursault has a gun and is irritated with the weather, he might kill someone. FOr this murder, whether it be provoked or not, I think that he deserves to die. An eye for an eye, as they say. However, I do believe that that he is less dangerous than a criminal with motive. With motive, I feel like Meursault would or could have gone on a murderous rampage because he actually had reason to.

All in all, I think that despite Meursault's absurd personality, we shouldn't kill him for that, but for his murder. He is a threat to society, and the "eye for an eye" should play a role in this situation.

Marie and Raymond are both very characters to us readers. For one, Marie plays Meursault's love interest (or as close to one as he could have), while Raymond essentially causes all the main problems in the story. They both show us Meursault's characteristics of apathy towards others. Marie and Raymond are both literary foils to Meursault. 

Marie and Raymond both bring out more of Meursault's character. When Marie asks Meursault if he loves her and he says that it doesn't matter if he does or doesn't, we get to see his indifference to love. Raymond brings out Meursault's apathy towards people. Whenever Raymond asks him of something, Meursault basically just nods and shrugs his shoulders. Through Marie and Raymond, we get to learn about Meursault's indifferent and almost emotionless nature as the story progresses.

In conclusion, Marie and Raymond are basically plot and character development devices. Marie develops character, while Raymond develops both character and plot. They shine light upon our protagonist's (if you can even call Meursault a protagonist) apathetic nature for us, the readers.