'Baptized' in the Bible

Has Christ been divided [into different parts]? Was Paul crucified for you? Or were you baptized into the name of Paul? [Certainly not!]

so that no one would say that you were baptized into my name.

Now I also baptized the household of Stephanas; beyond that, I do not know if I baptized anyone else.

And all [of them] were baptized into Moses [into his safekeeping as their leader] in the cloud and in the sea;

For by one [Holy] Spirit we were all baptized into one body, [spiritually transformed—united together] whether Jews or Greeks (Gentiles), slaves or free, and we were all made to drink of one [Holy] Spirit [since the same Holy Spirit fills each life].

Otherwise, what will those do who are being baptized for the dead? If the dead are not raised at all, why are people even baptized for them?