I think the IDW series Klingons: Blood Will Tell
needs to be included in any reading list on this subject. It only delved briefly into the conflict itself, but it did show another perspective, from a highly-placed (as in: on the High Council) QuchHa
family, in the same time period. The argument was that in the effort to prove their "Klingonhood", the QuchHa
fuelled an entire new phase of expansion of the Empire. The prejudice existed, but was not insurmountable.
Also, it may be that a sufficiently large portion of the Klingon population was affected that keeping the QuchHa
down completely just wasn't a feasible option.
(Looking forward to KRAD's upcoming story)