>>81829247Yeah one of the kids he adopted in Gruenwald's run, if I am not mistaken, was black.
It's got to do with his hateboner and obsession with Steve and the fact that with Bucky he thought he hadn't yet earned the right to be Cap or the right for redemption so it pissed him off that Bucky was Cap, especially since no matter how much he hates Steve he considers Steve a worthy adversary and someone who needs to meet a fitting end, especially by his hand (which is why he didn’t kill Steve right away in Standoff).
So to him any Captain America has to meet his own standards and has to measure up to Steve.
I am guessing with Sam it might be a similar thing, by now Zemo is most likely annoyed at Steve just giving out the Captain America name to anyone.