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Does it really? Do you feel the same way about western society and, say, duels to the death? The many old practices regarding marriage and the church all around?Yes, I would. Such societal norms don't just die, they remain in the "ether" so to speak.
For example, americans might not be as religious, or sticking with the church. They might not even be born in the US, or just be first or second generation. But the culture, and this includes immigrants as they integrate, contains all kinds of protestant ideas.
And it's easier for something like a suicide norm to survice that a practice of the duel (which takes two to survice, plus has the law against it, even if you come out alive).