Jeet09
What Columbus did, as a Christian, was not in keeping with the practices of his time.
Unless you want to find the bits of the bible where Christ demanded his followers smash the other cheek.

The old testament has a provision for slavery but even there the slaves are to be set free every 7th year.

(Not even sure Columbus was such a great explorer.  Others claim to have sailed those seas and certainly Columbus seemed to be lost - thought he was in India.  4 trips did sort it out for him.)