Who is This Guy?

I think Mersault is just a confuse guy. He doesn't know his own feelings and he doesn't know how to react to certain situations. He seems like a regular guy and knows a lot of people in the neighborhood. But his attitude is like he doesn't care about nothing that goes on around him as long as he his living and doing what he has to do. I thought it was really strange the reaction he had towards his mother's death because usually when someone mother dies they would breal down crying and wouldn't believe it. But his reaction was like oh, she finally died it was about time she been living for to long. When I notice reaction it automatically told me that he has no emotion what so ever. I think making a character like this makes people question other peoples emotions to see if people are really like that in our world and really don't care for anyone but their self. I don't really understand what Camus is proove on what a stranger is by making a character that has no emotion and care more for himself than other people.