Gosh, I am surprised to hear this...people during the 50s used 'colorful' language, I heard it often...
I really dont understand why you wanted the characters to redeem themselves or redeem themselves for what?
This is a wonderful movie, and the colorful language used, was not done to shock or anything like that...people of that time, especially many of the men, did talk like that...my dad did, and I never thought that he should redeem himself for it...
Sorry, but I just dont see this the way you do...
My father was born in 1946, my mom in 1950. Both of them heard four letter words in their neighborhoods and from relatives as children. However, it was usually the case that while men swore among one another, they rarely, if never, cursed in front of ladies. Ladies, of course, NEVER swore, unless they were "trashy."