Dear Sardab
You need to understand that Christianity is only recognised by a transformed life, not by claim; its a way of living, caused by a changed life.
Killing, genocide and persecution is not mentioned in the New Testament as being practised by Christians. I suggest you read passages such as Matthew 5-7; John 15-16; 1 John 3; they may clarify this matter.
Concerning Rhwanda, it may surprise that the exactly opposite is occuring in Sudan, where Muslims have genocided Christians and animists for years. Some statistics says that 2 millions have been killed.
Be blessed
Kai