No. Racism is unbiblical.
My point was when we define "biblical" as ideas that people can use verses to support then we open the door to all kinds of error.
Using your example - abstaining from fornication is biblical. Forced castration to prevent fornication is not biblical, although it would encourage people to abstain from fornication.
I just used racism as how evil men used verses in the Bible to support their evil.
The Puritans did the same in the early 17th century. They read passages but misapplied those passages, believing their actions were biblical because they could point to verses in the bible from which they derived their actions. (Granted, much of the Puritian heresy was in misunderstanding the identity of the church).
It is the same with
@Cathode and the sign of the cross (except there is absolutely nothing wrong with that sign). We are told repent. We are to live holy lives, to be identified with and imitators of Christ. The principle is biblical. The sign is an expression of that biblical principle. But the sign itself is not biblical (the cross was not even considered a Christian symbol during the Apostolic church period).