Cultural diversity is a good thing, humankind adopts better practices at a quicker pace because of it. However, not all cultures are worth having around. Face it, some cultures promote selfishness, ignorance, and violent faiths. These people are worth converting to a more rational condition. Genocide misses the point. If you don't like a people then convert them to your ways. Killing someone because of their culture does not kill the culture. Promoting a society structured on rational law, prohibiting religion, promoting love and compassion -these practices are much more likely to kill a culture. Just look at the way American Jews have become accepted as "white" and tolerable as opposed to the Israeli Jews who no one likes. Race is nothing, culture is everything.
-The Unknown Philosopher