There is no such thing as a safe culture. You enjoy the illusion of safe within your own culture, because of in group beliefs, but essentially PEOPLE are dangerous. That's why I like to read murder mysteries. Homicide detectives see the potential for evil in everyone. Even dear sweet Agatha Christie understood this, which was why each of her characters were flawed, even if they had a perfectionistic Fi moral disgust towards the murderer animal.
Racism stems from this concept - that only the in group is safe, or only the out group is dangerous.
There is logic to this - that trusting the in groups are safe, or that the PRINCIPLES of some cultures are less preferable to our own. I'm mostly on the side of the latter - the former can be an erroneous conclusion, but the latter is completely open to debate based upon real results of equality, progress and general safety. Which is why I love African Americans but don't trust Muslims.