There is a name for this type of argument: "And you are lynching Negroes".
The Soviets used to end every dispute with the US during the 50s and 60s with it, to devastating effect in the decolonizing world.
Which is why it was motivating factor among many elite US institutions (like the State Department) to abolish segregation. However, this time around such cajoling is unlikely to have such an effect, especially as large numbers of the US elite seem to be remarkably uninterested on what the rest of the world thinks of them, although this is much better under Obama than his predecessor.
