James Robinson wrote:
How do you feel about the registration of firearm?

That is in fact quite different. Registration of firearm is no different from
registration of a car or aircraft. Since since all three are dangerous and
kill (with the firearm designed for the sole purpose fo killing and giving no
transportation or other benefit), it is only normal that a government would
want to ensure that you are qualified to operate such a device by requiring registration.

But if a government captures your own body's information (fingerprints, DNA,
eye retina scan etc), then they "own" part of your body/identity.