That seems improbable. To pick the first example I Googled off of the Atlantic webside: Chart of the Day: Obama's Epic Failure on Judicial Nominees contains some substantive criticism of Obama - can you show me where it contains "code words" of this kind?
It's not an improbable claim so much as a nigh-unfalsifiable claim.
I mean, imagine the following conversation between two hypothetical people, arbitrarily labelled RZ and EN here:
EN: By finding enough "code words" you can make any criticism of Obama racist.
RZ: What about this criticism?
EN: By declaring "epic", "confirmation mess", and "death blow" to be racist "code words", you can make that criticism racist.
RZ: But "epic", "confirmation mess", and "death blow" aren't racist co...
Here's the new thread for posting quotes, with the usual rules: