Is "homocide" the killing of a homo?
No, that is hatecide, unless committed by another homo and then it is called, "Ooops!".
No! The "homo" comes from the word "homo sapian" = which is another word for human. Here's what Webster had to say about it: "Etymology: New Latin, species name, from Homo, genus name + sapiens, specific epithet, from Latin, wise, intelligent"