are idoma and igbo people related? (Page 3)

ok so this the situation. I met a  nigerian at a funeral today. He approached me and asked me my name, and I told him,  Ihunayachi Bashari, so he replied, am guessing you must be igbo and a northerner mixture.I say yes, mostly ngwa igbo and hausa. He laughs and says igbo is igbo. I smiled and said i guess so. So after a sec he introduced himself as chinemelu Ezebunnadim. I was like, so you are igbo too, and with a confused look on his face he says no am idoma. I was like what's the difference? And he started telling me this tall
tales about how idoma people came from edo and igala  people. I was like okayoo. Personally my family is composed of so many tribes, we are not tribal, but we at least acknowledge the different parts of us. So to not argue I accepted his definition of what idoma is. So I asked him to speak his language and to me he was speaking igbo, a dialect of it, just like my ngwa igbo and  my kano hausa is different from central hausa.Its so weird, so to native igbo speakers please enlighten me, are idomas related to the igbos, cause it makes no sense that you speak the language share names, and even traditions and yet you say there are no relations.Personally I believe we  are all mixed with each other some how..but this guy just looked like i had stoned him by calling him igbo, or at least of having relation to igbos.