Some Deaf people feel threatened by the implants, as they think this will cause the Deaf culture to get smaller and smaller and perhaps disappear altogether. I myself don't see that happening. The CI is not going to make the deaf 100% hearing. Turn the processor off, and you're deaf again. A CI doesn't make a deaf person hearing, but some might think that? I don't know. It confuses me too. Some CI users still continue to use ASL/sign language, and others do not. Everyone's different in their own ways, in the ways they were brought up and of their own knowledge and opinions. But no matter what, I think there will always be deaf people around for a long time. Deaf with CI, deaf with hearing aids or Deaf, they're everywhere right now, and this will last for who knows how long (never knowing what science is going to do with the whole cell regeneration and trying to cure deafness).
I don't know those deaf people thinking that CI will cause the Deaf culture to disapear. Are you sure you have been told this by deaf people?
The only ones who tell me this, is oralists who claim the resistance among deaf people is due to CI beeing a threat to the deaf culture. They don't want to talk about the resistance beeing due to failures of oralism and the burden those people can be on the deaf community.