I think what Josh is trying to suggest is that it is somehow my personal, other-team bias against Ronald Reagan that makes me balk at his invocation of "responsibility"--that if, somehow, Obama or JFK had said those words, I would be more likely to believe them. At the same time he's also suggesting that leftists are unable to believe in personal responsibility, despite ample evidence to the contrary above. Walking himself into a contradiction here is, of course, nothing new. What's unclear is whether he's doing this to deflect from my point or whether he simply doesn't understand it (really a coin toss here), so I'll state it more clearly:
The recent revelations of Reagan's racist comments should cast doubt on him not only as an authoritative speaker on public morality in general but should also and more specifically make us question what kind of connection there might be between a man espousing a credo of personal responsibility in opposition to a focus on structural determinants (like historical racism) and that same man himself saying avowedly racist things--that perhaps his steadfast belief in personal responsibility stems not from a clear-eyed assessment of American identity but is more intimately linked to the kind of blinkered and prejudiced worldview on display in that conversation with Nixon (link
here for the uninitiated, though the idea that
only these comments testify to Reagan's racial animus is a bit myopic too). That's why it's important that Reagan said these words, rather than Obama or JFK--because one of the main tools of rhetoric is the authority of the speaker and for a good section of the reading public Reagan's is (mercifully) eroding.