Have you tried tracing your family tree?

My great, great paternal grandfather was Irish. Surprising fact is, Ireland is one of the few countries that allows citizenship by ancestry as far back as your great great grandparents. I've never been to Ireland but would love to visit, especially Dublin, Kilarney national park and the Aran Islands.
We sometimes never know our true ancestry but mine is a mix with Japanese, Irish and also some French thrown in on my maternal grandfathers side. There is no such thing as 'pure blood' and maybe if people realised this, racism might become a thing of the past.