I firmly believe that genocide in some cases can be justified
What is your reason for believing this?
If someone endangers your life I guess.
I do not think that that is a fair trade off. It is wrong to dislike someone based solely on their race.
Not really. I believe so many people are better off without a primitive culture.
You shouldn't ever really try to justify genocide. Most people would agree that it is a pretty terrible thing. There are better ways to solve issues in the world.