No, its a shame tactic Hoover used to diminish his credibility.
Hoover was on that crabs in a barrel bullshyt. Nikka was all kinds of fukked up, a quadroon in a white world, no wonder he took to wearing dresses and calling other dudes daddy.
You do realize that that Irish grandfather was on his mother's side, right? That is no different than Malcolm X whose mom's father was white. It is all about the seed of the man on your father's side. The woman do not have seed, they are incubators. Muhammad Ali and Malcolm X are still Jakes and that is according to Numbers 1:18.
It wouldn't matter if the Irishman was on the mother or father's side. The Irish didn't even get human status until what, 50 years ago? They weren't considered white. That 'incubator' talk is sexist. Mother's milk matters. Trying to save some male pride by saying 'yeah it doesn't matter if I marry non-black because my genes will pass down' is bullshyt, especially considering the rape of Mother Africa and just how many nikkas in this country have Massa's blood in their veins.
As for Malcolm's white relatives, wasn't there an article a couple years ago about the white side trying to present the white rapist/manipulator as someone who really really really truly loved the underaged black girl who ended up being Malcolm's grandmother? Blew my mind when I first read it, enough time had passed that whites would think it's no big deal to try to latch onto the GOAT of black empowerment's legacy.