The Deaf Community and/or Culture is much different from its hearing counter-part, in every spoken language culture in the world. This was one of the first things I learned as a young teen growing up with multiple Deaf family members, spread across three generations. Culture is born between those who have similar experiences, but especially among those who share the same language. Sign language is the mode of communication that gives birth to Deaf Communities/Cultures around the world.
The Deaf Community is a distinct and separate culture from the majority hearing culture. Since the mode of communication of Deaf people is a manual language (on the body) or signed language, that and shared experiences, often from childhood, knit them together in culture, as well.