Xenphobia in South Africa and then Igbo-Phobia in Nigeria??

So, I was minding my page on Facebook until I came across this chat between two people, posted by someone of plans for them (whoever they are) to get rid of the Igbos by hurting or even killing them.
I had to pause for a while to ask myself this question, I wasn't able to give myself an answer so I want to throw it out to you my fellow Nigerian brothers and sisters- What makes us different from South Africans if we can have such bad thoughts towards one another?  God will surely help Nigeria
To read the chat in details continue after the cut...